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 Jan 22, 2001 |
CIM systems and Final Assembly CIM systems for electronics assembly have traditionally considered the PCB only. Final assembly "modules" are often attached to traditional systems to accommodate this common requirement for pre-PCB assembly, mechanical assembly, and final assembly integration of multiple products into a single system. I suggest one product evaluation test; if final assembly requires a "module" it isn't integral to the system design. Fortunately, systems do exist for handling ...
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Jan 16, 2007 |
... line integrated circuit and other semiconductor component assembly and failure analysis laboratories. A few of years ago, �Wire Bonding in Microelectronics� seemed less relevant to electric circuit board assembly than it does today. Today, the wider acceptance and use of multichip modules and chip on board technologies as mainstream technologies make this book an important tool for practitioners in electric circuit board assembly. Mr. Harmon assumes the basics of operating wire bonding ...
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Aug 22, 2006 |
... compliant if it has a surface finish other than Hot Air. To be ROHS compliant and Able to with stand Lead Free Assembly, this is where the board house would need to switch to a Material with a Higher Td. or De-comp. Standard Material in USA for Lead Free Assembly is Isola IS410 180 Tg. / 350 Td. This material has a different Resin content that is able to with stand the higher Assembly Temps needed to flow lead free paste. IS410 Material Looks like ceramic material and has similar draw backs, its ...
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Nov 2, 2004 |
Gerber Data Extraction Smart Sonic has an entry level component to our StencilScan AOI system called the Assembly Module GT. The Assembly Module GT is low cost and will get the job done. Plus, the Assembly Module GT can be upgraded easily to the other Assembly Module products that include the ability to scan boards, create Gerber data & placement data, ability to scan components and create vision files for placement machines, first article inspection, etc. There is some information on our web ...
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Nov 1, 2004 |
Convert Gerber files to Cad (text file). Smart Sonic has an entry level component to our StencilScan AOI system called the Assembly Module GT. The Assembly Module GT is low cost and will get the job done. Plus, the Assembly Module GT can be upgraded easily to the other Assembly Module products that include the ability to scan boards, create Gerber data & placement data, ability to scan components and create vision files for placement machines, first article inspection, etc. There is some ...
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Sep 2, 2008 |
... assembly specification? > I am new to the board so be gentle with me. > There are standards such as IPC-610 for PCB > assembly, IPC-600 for bare boards, etc. Is there > a "standard" for electro-mechanical assembly? Is > there an IPC standard or any other industry > approved standard that can be applied for or > achieved? > > Thanks for your help in advance! > I am new to the board so be gentle with me. > There are standards such as IPC-610 for PCB > assembly ...
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Nov 2, 2006 |
... calibrated test solution comprised of IPA and DI water. The test solution extracts contamination from an assembly. In order to determine the assembly�s contamination, one must first know the exact cleanliness (resistivity) of the test solution. Before an assembly is inserted into the test solution, the test solution must be �cleaned up�, removing prior contamination from the assembly. This �clean-up� process is accomplished by directing the test solution through ion-exchange resins ...
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Aug 10, 2000 |
... or assembly operations. If stress is present in the board prior to the heating operation it will often result in board warpage. If, on the other hand, the board or assembly is not supported correctly during heating and cooling cycle it will result in the board having stress built into the material. The design engineer should always aim to layout a balanced construction with copper tracking and earth planes balanced from one side to the other of a two layer circuit. Fig 1 Example of assembly ...
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Jan 29, 2007 |
Lead Free BGA's on non-RoHS Assembly I'm about to begin a job for a customer placing a couple of lead free BGA's/FPGA's on an assembly that doesn't need to be RoHS compatible. So...my question is...should I process this assembly with lead-free solder paste, to accomodate the lead-free BGA/FPGA process requirements? Will I introduce other potential problems with non-RoHS parts in the design, or should things work out ok for the entire assembly? The one thing I want to avoid is using lead-free ...
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Nov 18, 1998 |
... Dave F Contact: Dan Green 847-790-5371 FOR IMMEDIATE RELEASE IPC/SMEMA COUNCIL UNVEILS PLANS FOR NEW ELECTRONICS ASSEMBLY PROCESS TECHNOLOGY SHOW Northbrook, IL 11/12/98 The IPC/SMEMA Council has announced plans for an industry sponsored trade show and conference on electronics assembly process technology. The event, yet to be named, is being organized by all of the major assembly equipment suppliers with the leadership of the IPC/SMEMA Council. The event will be launched in March 2000 at the ...
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Nov 15, 2006 |
... AJ, The biggest mistake in the industry today is documentation for lead free assembly required product. We are still seeing prints coming in saying Lead Free / High TG FR4. When in reality standard FR4 170 Tg. material is considered High Tg. and Lead free but is Not Made to with stand lead free assembly Temps. For Lead free assembly product - it should be calling out High Tg Material capable of with standing assembly temps of 340 C. This would let the board Manufacture know to switch his ...
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Oct 14, 2009 |
Assembly Drawing Software - Which one? Hi, Everyone! What do you use for Assembly Drawings? I need Electronics Assembly Drafting software, and I am hoping to hear your recommendations. The core functionality I need is the ability to translate X/Y coordinates (ASCII file) to my Gerbers and CAD data. Along with manual entry for thru hole parts, and the addition of photos, of course. Most of the end results look the same. Resistor 1234 is yellow, and you can see all its placements. Resistor 5678 is ...
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Jul 19, 2008 |
Box Build/ Wiring/ Terminal Blocks Assembly Drawings??? I have alot of experience creating assembly drawings for SMT and THT products. However, we are now doing very large ,complicated box builds that have many terminal blocks, point to point and cable harnesses. It is my job to create these assembly documents in a very simplified way so that the assemblers are as efficient as possible and potential for errors minimized. I have seen examples of this type of documentation in the form of: 1 ...
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Oct 19, 2004 |
Assembly Time Standards Hello, I am looking for industry time standards for assembly tasks, from SMT to product packing. I was told a few years ago that IEEE had these standards. When I finally looked, they did not exist that I could find. Does anyone know if / where such industry standards exist? I am looking for more manual assembly / mechanical assembly tasks for an Excel based labor quoting tool. Please advise, thanks ...
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Jul 22, 1998 |
... Type, Size, Shape, Panel Requirements, And All Other Printed Circuit Fabrication And Assembly Requirements. Marking Requirements Component Location And Orientation Requirements Engineering Change Notices Concurrent Contract Review Requirements Check List For Manufacturing 1) CONTRACT REQUIREMENTS Bill of Materials Master And Assembly Drawings Acceptance Specifications And Test Methods Assembly Identification Documentation Listing And Control Requirements Business Issues (Price, Delivery, Quality ...
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Jul 20, 2000 |
Paste Push-Out In PP Assembly Bob: On "paste push-out" (when inserting a component lead into a through hole pushes the paste out of the hole) in pin & paste assembly: * What factors affect paste push-out? * What techniques reduce this effect, given a board design and component lead size? Continuing, how do different solder paste formulations and mesh sizes perform in pin & paste assembly? What is the preferred paste formulation and mesh size for pin & paste assembly? Thanks
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Jan 22, 2001 |
CIM systems and Final Assembly CIM systems for electronics are very PCB-centric in that they�re not designed for final assembly. Is there anything available that can take me from assembly to final assembly and shipment ...
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Dec 8, 2000 |
market statistics on SMT Assembly ? Hy all, i'm in need for some data about the electronics market: - general Industry Data of SMT and SMT Assembly - SMT-worlwide Production / Turnover - ratio of THT / SMT - Structure of productions cost (Parts, PCB-Assembly, Final Assembly, Investment costs / Labor Costs ..) - ... Can anybody tell me where I can find some of this data ? Thanks Andreas
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Sep 16, 2005 |
quoting assembly work We have just launched a new contract assembly house and I was wondering if there was anybody out there that had an honist formula for calculating labor cost for the purpose of bidding assembly work, "is there a good canned software package that actually works for this industry" in our geographic area prices can range by as much as 100% on the same assemblies. what is the average burden rate for an assembly house utilizing automation for SMT and thru-hole, what is an ...
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May 4, 2005 |
... I will explain my problem with this process: In our site we are doing a manually FAI before reflow for every assembly. One of the steps is to check the writing on each QFP or BGA (every component that come in trays) against the writing in the BOM of the same assembly. This step is necessary for our production from the rezone that we are not open the tray bags until the assembly beginning, (moister problems). Sometimes, we had a situation that a tray came from the supplier with different ...
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May 7, 2008 |
... with NAICS (North American Industry Classification System) in the US. See http://www.census.gov/epcd/www/naics.html NAICS code 334418 Printed Circuit Assembly (Electronic Assembly) Manufacturing. This US industry comprises establishments primarily engaged in loading components onto printed circuit boards or who manufacture and ship loaded printed circuit boards. Also known as printed circuit assemblies ...
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May 27, 2006 |
SMT Assembly Line We are prepairing a budget for the purchase and installation of a complete SMT Assembly Line. We need to assembly 25K units/month at the begining, and up to 100K unit/month in 1 year. The size of the PCB is around 3"x3" and the following components (1xBGA, 4xFPGA, Pasive components, some active components and some Thru-hole connectors), total ~150 components/board. We want to run the system 16 or 24 hours a day. Any suggestion about manufacturers and price? Best regards Efren
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May 22, 2006 |
Low Cost High quality pcb prototype and Assembly manufacturer(CH Low Cost High quality pcb prototype and Assembly manufacturer(CHINA) +silk+mask price is same. if you send pcb file to us,we will reply quote as soon! we can assembly for your company!! if any question, please send mail us!!!!!! Sell high quality HDI PCB (CHINA) we supply quick pcb. we supply color board, Mail: njpcb@vip.163.com or sales ...
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Dec 26, 2001 |
Programing Hi Yannick, Smart Sonic has just introduced the "Assembly Module" to their StencilScan AOI software package. By adding the Assembly Module to StencilScan AOI, one workstation allows you to inspect and compare the stencil to the PCB and Gerber data and use the same software to produce assembly files for multi-vendor pick and place, insertion, test, inspection and dispensing machines. The system is Windows-based (user friendly) and only a $3000 add on to the StencilScan AOI system. It's ...
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Aug 30, 1999 |
Odd Form Assembly Equipment Can anybody can give me feedback on odd form assembly equipment manufactured by DT Industries (Assembly Machine. Inc., Cherie, PA) and PMJ automec Corporation(Finland). I would like to know about these companies product development techniques, manufacturing techniques, customer service center, technical support. I would also like to know about equipment performance and specification. Thank You Prashant Vithlani
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May 26, 2000 |
Economics for Electronics Assembly I am a Ph. D. student in Technology Management at Stevens Institute of Technology, Hoboken NJ. My thesis idea is related to Economics for Electronic Assembly. The general idea is to create a sensitivity economic model related to the design and manufacture trade-off of integrated circuit boards. I need help in obtaining capital and operating costs for electronic assembly. Is there any hanbook or industry source with published data? Or do companies have typical ...
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Jan 4, 2010 |
... free Material during assembly may cause this Conductive filament to grow within the material weave. They are water washing after through hole assembly and then after water washing they are doing hand assembly. I'm not so concerned about the water its self as I am thinking that it can open a channel for the flux to follow into the weave of the material itself to were as to start the CAF process or formation prior to Electrical testing or burn in of the finished assembly. Its this Electrical ...
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Nov 13, 2007 |
software to produce assembly programs Hi Try Unisoft (founded 1986) they are reasonibly priced and program your assembly machine from either gerber or CAD - 203-913-0782. The software you need is called ProntoPLACE ( http://www.unisoft-cim.com/pcbplace.htm ). Programs and optimizes PCB assembly machines offline. ProntoPLACE ( http://www ...
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Mar 21, 2007 |
... the jaws machined towards the rear of the jaw to increase reach. Set up and calibrate that head with that chucking assembly. Always use the same chucking assembly on the same head as different chucking assemblies on the same head may need a different head offset in the system files. Simply calibrate each assembly on each head and record the different head offsets for each assembly. When you change assemblies change the head offset to suit. You may need to change the centring height. Your 0402 ...
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Oct 12, 2004 |
PCBA VALIDATION We do not outsource assembly of our product, but we have discussed it. So, until other fine folk at SMTnet respond, we thought we�d rattle on for a while and maybe inspire some other chatter on the topic. As we understand it, you: * Currently contract your board assembly. * Assemble, test, and verify performance of the product. * Plan to contract all board assembly and product assembly, test, and performance verification. * Would like to understand the risk in not performing ...
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Sep 24, 2004 |
cellular phone assembly Hi FengAng, Sorry about the misunderstanding - last time I was out there all of the front end SMT equipment was very good, but the final assembly of the phones into cases was being undertaken by hand, whereas in Europe we were seeing a lot of automation on the back end assembly to cut costs. Most of the equipment you mentioned was SMT, are you using Robots for the final assembly (Keypad, display, casing etc)? How are you finding the FCM's in comparison to the Panasonics ...
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Mar 4, 2002 |
Hand Lotions I don't like hand lotions in the assembly area. If hand lotion is needed I would have the operators use latex gloves or finger cots. The lotion can be transfered to the bare board or assembly causing reliability issues. Lotion transfered to a bare PCB can cause solderablitiy issues. Lotion transfered after assembly can cause dirt to stick to the assembly also causing contamination issues. Lotion also will not allow conformal coatings to adhere to the surface. If lotion is desired ...
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Feb 12, 1998 |
Wash and bake of blank PCB's before assembly I would appreciate any information concerning the wash and bake of blank Printed Circuit Boards before assembly. + Is it necessary to wash and bake PCB�s before assembly? + If any, what is the reason for wash and bake of PCB�s? + If any, what type of PCB�s should be wash and baked? + Does wash and bake have any negative effect on the assembly process? Thanks for any help ...
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Jun 4, 1998 |
Wash and bake of blank PCB's before assembly I would appreciate any information concerning the wash and bake of blank Printed Circuit Boards before assembly. + Is it necessary to wash and bake PCB�s before assembly? + If any, what is the reason for wash and bake of PCB�s? + If any, what type of PCB�s should be wash and baked? + Does wash and bake have any negative effect on the assembly process? Thanks for any help ...
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Dec 31, 1998 |
... CSP assembly. I prefer to use no-clean, however, not all components are suitable to use it. Especially those dirty capacitors or connectors which may cause solderability problem. It may the reason someone prefer to use aqueous clean paste. | | | | | | Besides, I want say that SIR test is used to determine the characterize fluxes under high humidity and heat conditions. If you want to know the cleaningness of the CSP assembly. You may need to know the "salt" content under CSP after assembly. If ...
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Dec 31, 1998 |
... CSP assembly. I prefer to use no-clean, however, not all components are suitable to use it. Especially those dirty capacitors or connectors which may cause solderability problem. It may the reason someone prefer to use aqueous clean paste. | | | | Besides, I want say that SIR test is used to determine the characterize fluxes under high humidity and heat conditions. If you want to know the cleaningness of the CSP assembly. You may need to know the "salt" content under CSP after assembly. If the ...
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Jul 13, 2000 |
... checked in file viewer 51 test coupon on PCB containing minimum geometry features 52 trace width sufficient for current carried 53 minimum component body spacing 54 SMD pad shapes checked 55 visual references for automated assembly 56 tooling holes for automated assembly 57 sufficient clearance for high voltage traces 58 component and trace keepout areas observed 59 high frequency circuitry precautions observed 60 thermal relief�s for internal power layers 61 solder paste mask openings are ...
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Nov 21, 2007 |
Ruggedized PCB Assembly Need some opinions from you fine folks. We are building assemblies 90% SMT, 10% TH. Fine pitch and BGA devices, etc. The customer is complaining about cold solder joints (SMT) after about 1 year of use, scattered thru-out the assembly, not consistant areas, we haven't actually seen a failed assembly yet, this is what the customer is telling us. The assemblies are visually inspected during manufacturing with no problems seen. The assemblies are used in equipment that ...
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Sep 5, 2003 |
Assembly Revision Control Hello, We're an EMS provider doing low volume/high mix production. We've found a hole in our ECO and revision control systems that needs to be fixed. Within our ERP system, whenever possible, we try to keep the customer rev of an assembly as our internal rev using a single digit letter or number. Problems arise when we need to do a simple ECO involving the BOM (non- form, fit or func.). We use what we call a "No Bump" ECO where a change can be made without rolling the ...
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Jul 11, 2001 |
Good book I�ve written a review to be published in an up-coming SMTnet Newsletter of �Printed Circuit Assembly Design� Leonard Marks, James A. Caterina [Hardcover - 368 pages (July 26, 2000) McGraw Hill Text; ISBN: 0070411077]. In short, � In �Printed Circuit Assembly Design�, Leonard Marks and James A. Caterina describe the processes, methods, and tools used in designing printed circuit assemblies, the considerations that influence how to lay-out a PCA, and the typical design ...
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Jun 27, 2006 |
Imm Silver and Voiding There was a good artical on this in Assembly Magazine October 5, 2005 by Donald P. Cullen, Director of OEM and Assembly Applications, MacDermid Inc., Waterbury, CT Heres the Link http://www.assemblymag.com/CDA/Archives/56840a86f06c9010VgnVCM100000f932a8c0____ Might give some ideas, also ask your board house a couple of questions, What chemisty are they ...
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Mar 9, 2000 |
Use of Wood on PCB Assembly Production floor ?? I have a question (s) on ESD- all related to use of wood in a typical PCB Assembly line: 1. How a wooden mini stool if used for holding tote box ( card board with static protecive coat, black color) can affect static sensitive devices inside the tote box / shipping tubes/bags/ PCB assemblies parially bilt ? The wooden stool sits besides operators seat and operator is wearing wrist strap and attached to grounded table. The point of contension is ...
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Mar 9, 2000 |
Use of Wood on PCB Assembly Production floor ?? I have a question (s) on ESD- all related to use of wood in a typical PCB Assembly line: 1. How a wooden mini stool if used for holding tote box ( card board with static protecive coat, black color) can affect static sensitive devices inside the tote box / shipping tubes/bags/ PCB assemblies parially bilt ? The wooden stool sits besides operators seat and operator is wearing wrist strap and attached to grounded table. The point of contension is ...
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Dec 21, 2009 |
... regarding CAF 2)should the boards be baked before hand assembly is done 3)do they need to be baked at all prior or after hand assembly. **These boards will be going through burn in electrical testing in 4-5 day's after hand assembly is completed. My concern is that the water wash prior to hand assembly without baking out the moisture can open the door for CAF condition with the mix of Flux. Please let me know your thought, Small assembly house is not sure if this process will be an issue. Thanks ...
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Apr 3, 2007 |
... through hole assembly from my home for an engineering company that strictly does through hole.I was offered a job doing surface mount assembly based on my knowledge of electronics assembly.I don't have knowledge of surface mount which was why I inquired about basic equipment. My company is 1 person, myself. So,the reason I am asking about equipment would be for me and not a large group of people. Since you don't want me taking your customers, do you know of any through hole assembly companies ...
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Feb 24, 2006 |
PCB Material TM, When picking a material for your lead free assembly you need to think about a couple of things, The standard Material in the US that is being used is running 140 - 170 tg. material. But for lead free assembly you need to focus on is Decomp temp (TD). or at what temp does this material start to de-lam. With lead free assembly especially during Wave solder the temps will have to be higher than normal Lead processing which can put this type a material at its upper limits and open ...
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Jun 28, 2003 |
Silica gel in final packing We have an Electromechanical assembly (clock) that has a step motor on the board. This electromechanical assembly is assembled in a screw less plastic moulded casing. The plastic casing is neither air tight nor water proof. The board is with SMOBC+ HALS finish. This electromechanical assembly is first inserted in a polythene bag (not sealed). Five such assemblies go in to one duplex board packing box. Later many such packing boxes (80) go in to one big bubble sheet ...
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Feb 13, 1998 |
... 100 C, typically. This stresses the overall assembly and points to any CTE mismatches. What really is not addressed by people is the thermal cycling that takes place in the assembly process. In essence, the product is cycled from 20 C to about 225C. That is significantly more rigorous than the aforementioned cycle. Because of assembly induced temperature cycles, PTVs under BGAs on thick board assemblies crack and fracture. Component functionality is sometimes compromised. Only six thermal cycles ...
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Jun 2, 1999 |
Polyimide PCB card assembly Hello all I have a question concerning whether or not there is any special requirements to follow for assembly of a Polyimide PCB card. The customer has the following information on there documentation but since we have never built anything with Polyimide PCB's this is new. The board is to be 6 layers with a thickness of .056" +/- .005". There is no solder mask and no silkscreen, no copper nomenclature on board. This is an all leaded assembly with the requirement of ...
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Jul 29, 2008 |
Box Build/ Wiring/ Terminal Blocks Assembly Drawings??? I know your pain all to well. We currently use bmps or jpgs and group them by station (for case assembly) We do this for inspection purposes. Sad truth is most people on the line end up becoming the "sole builder" of the product and decide they have a better method. They dont notify the goup that makes the documentation so the nice instructions you made are for crap. I think this is going to need to be determined by your staffing, volume ...
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