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Jan 10, 2018 | Copper Core MCPCB vs. Aluminum Core MCPCB Copper has CTE of 17 which I think is closer to FR4 than Aluminum - 23, so in this aspect should be better. However, copper oxidizes very easily and is also 3 times heavier.
Nov 7, 2017 | Hi I'm new to the world of wire bonding. I seem to have some sort of pad contamination Preventing gold wire from bonding to aluminum pats. There appears to be a dozen microns size particles. And a slight crackling of the surface at 500 X. I am sending it off for elemental EDX. Are there any ks bonding problems gold wire on al pads
Oct 11, 2017 | Absolutely use aluminum. I have done it to keep a huge board flat after reflow.
Aug 1, 2017 | I need a pcb cutting machine for separating the aluminum board FKN Systek makes Depanelizers that work on aluminum boards. Please call me at 508 376 2500 or send email to discuss. We usually get a customer sample just to make sure. We have been selling the K3000 and K4000 Depanelizers for over 10 years to customers that cut aluminum every day. Go to
May 18, 2017 | wire harness strength We are soldering wire 26AWG to jack socket. However after went through washing, baking, coating, curing processes the wire breaks (at joining point with jack socket) during wire dressing. We have tried to increase and decrease the solder amount but rejects still happened. pull test of wire and jack socket is 40++ N. I found that the break wire has exposed copper on wire strands. what will be the possible root cause and what can I do to increase the wire strength?
Dec 14, 2016 | Au Wire bonding failure Hi all, Recently, we are trying to do wire bonding between a 75 * 75 um pad on a chip and substrate with 150 um height difference, but when completing wire bonding and the wire bonds on pad and substrate, the pad will get out of the chip easily, so do you have ideas about the issue? and how to avoid it? We use 0.7 mil Au wire and the pad is plated with gold.
Oct 4, 2016 | IPC-7721, Section 6.1, Jumper Wires, Jumper Wire Selection #5 states: "Recommended wire is solid, insulated, plated copper wire, 22 to 32 AWG with a heat resistant insulation. Wire with tin-lead plating may be restricted due to environmental laws." Yes, etching is a common method to condition fluoropolymer coated jumper wires prior to staking and /or applying conformal coating. Often, teflon coated wire is not the first choice of materials in hi-rel products. Select a wire to match current handling capacity of the circuit to be replaced.
Feb 15, 2016 | Remove the aluminum plate/filter. The first board on left side. The run/halt switch should be visible.
Jan 17, 2016 | Managing Thermocouple wires during reflow profiling We are using KIC (kicthermal.com) in reflow profiling. It uses thermocouple wires about 0.5 meter only each point. Previously, Winkic the machine built in software which requires about 5 meters wire. No need for the operator to stand there and feed the TC wires.
Jan 15, 2016 | We rarely do profiling so we don't need all the new fancy stuff. But when we do I get a piece of aluminum rod and an empty reel of parts (preferably a 12" reel) fasten the thermocouples and wrap the loose end around the reel. The larger reel gives enough tension to keep the wires from getting Managing Thermocouple wires during reflow profiling
Jan 8, 2016 | Managing Thermocouple wires during reflow profiling We utilize the built in profiling equipment in our reflow ovens. It's somewhat tedious to have the operator stand there and feed the TC wires in as the board progresses through the oven. Otherwise the wires sometimes hang up and the board stops moving through, like it's tethered. Also, when profiling to use the edge hold chains, it puts the wires close to the edge of the mesh belt and the wires sometimes get caught. Does anyone utilize some kind of feeding mechanism for the wires? I'm picturing a fishing reel type device that would slowly feed the wire or allow it to be unspooled.
Aug 21, 2014 | We use standard "pizza cutter" type depanelizer. You just need to use knives made for aluminum boards, because standard ones gets dull quite fast if used on aluminum. CAB has special knives for aluminum, but I think other manufacturers offers similar products.
Jan 23, 2014 | stranded copper wire - tin or not tinned I agree with AFlex. Don't tin stranded wire that's assembled into a screw terminal block. I believe the reasoning has to do with avoiding stress on the wire metal caused by different expansion rates of the solder and the wire. BR davef
Sep 10, 2013 | Aluminum wire bonding on ENEPIG plated PCB Plasma cleaning is used extensively to clean surfaces prior to wire bonding.
Sep 9, 2013 | Aluminum wire bonding on ENEPIG plated PCB I don't know, but here is a link to a paper from the fine SMTnet Technical Library on a similar topic: http://www.smtnet.com/library/files/upload/Wire
Sep 9, 2013 | Aluminum wire bonding on ENEPIG plated PCB Hi, We are having issues aluminum wirebonding on ENEPIG plated PCB by a too low pull force and or having lifts (1% range). Could any body advice how to solve this problem? Is there a special wire bond grade required? How to best clean contaminants by the SMT vendor? Thank you in advance Ton
Oct 21, 2010 | ROGER 4003C bounding to Aluminum OGER 4003C bounding to Aluminum I am hoping someone might have the solution to my problem I have the following PCB: RO4003 Thickness: .2mm Layer: top single/ bottom ground plane Finish: silver top and bottom .2um Size: 3mmx6mm I need to bound/ground this to an aluminum carrier with silver finish . I tried tinning the ground plane of the PCB and the aluminum carrier with RoHS solder Then using a hot plate I increase the temp of the aluminum carrier Applied flux to the PCB ground plate And applied the pcb to the aluminum carrier Using a weighted jib I would hold the pcb on top of the aluminum
Mar 19, 2010 | The aluminum material is typically plated by a zincation process, followed by nickel plate and a gold flash layer. What do the soldered side of the component and the soldered side of the aluminum coin look like? Do they both take solder?
Mar 19, 2010 | Coins are sometimes used on PCB's with RF Power Field Effect Transistors. These boards are usually mounted in an housing. They provide a ground path for the transistor to the PCB and thermal path to the housing. The coins are usually made of aluminum or copper. The coins I am working with are made of aluminum. The attached pictures are an example of want I am working with.
Dec 11, 2009 | Hi All, I have a PCB that is bonded on an aluminum plate. The size of PCB is 11" x 8" and 0.065" Thick, The aluminum plate has the same size and thickness as the PCB. Process is Lead Free. Questions: Is it possible and achieveable to bond the PCB with only 20% of void area? Is it possible
Dec 11, 2009 | I use aluminum tape. Attach the thermocouple to the solder joint of a component. Use tape to hold down the wires so your thermocouple doesn't break free. Go to youtube and search "oven profile". There are some great "how to" videos there to help you.
Aug 26, 2009 | Solder Wire Expiry Dates Hi We have recently noticed that our lead free solder wire is being supplied with expiry dates (typically 2-3 years after manufacture). I have seen "date of manufacture" information on wire before but I was not aware that a cored solder wire could expire. I would be interested to hear if you also have expiry dates on the solder wire you use or if it is only this manufacturer? Also has anyone used wire that has exceeded its expiry date and has any degradation in soldering performance been observed as a result? Many thanks
Aug 11, 2009 | Thermal Management PCB such as aluminum core, etc.
Jun 23, 2009 | Are you sure there is any "cleaning" needed? Can you see leftover bits of the teflon remaining? If so, work on it with an Xacto knife. But, most thermocouple wires are VERY hard to solder - as in practically impossible. Many of them have aluminum, nickel or chromium in them, typically hard
Oct 7, 2008 | was not Found ( which usually protect Nickel from oxidization) the Wire Bonding for COB used is Aluminum Wire. all though the COB was Fine in that test. My Query is 1. Is there any Std for thickness of Eletrolytic Ni and Gold ? i can find only the E"less thickness no E"lytic ? 2. Since in Eletrolytic Process no Phosphurous is used is it possibility of corrosion or oxidization of plating Holes? 3. Since i am not sure what thikness of Gold to Specify i can't sure if i used Aluminum Wire it may corrode too due to Nickel Al oxidization 4. How Reliable is the Aluminum Wire Bonding in terms of Pull test
Sep 19, 2008 | Four Points supplies materials to stencil fabricators. Four Points, SMT Stencil Supply: Standard Frame Sizes 8" x 10" I.D. Cast Aluminum 12" x 12" I.D. Cast Aluminum 15" x 15" I.D. Cast Aluminum 12" x 17" I.D. Cast Aluminum 15" x 15" I.D. Cast Aluminum 20" x 20" I.D. Cast Aluminum 24" x 24" I .D. Cast Aluminum 23" x 23" x 1.0" x 1.5" O.D. Tubular Aluminum 29" x 29" x 1.5" x 1.5" O.D. Tubular Aluminum 23" x 23" x 0.5" x 1.5" Space Saver Frames 29" x 29" x 0.5" x 1.5" Space Saver Frames 29" x 29" x .375" x 1.5" (solid) Space Saver Frames Fuji , Sanyo, Panasonic , Sony, MPM SPM, frames Large
Aug 2, 2008 | I built aluminum cage add ground wire to it but my problem is not gone!Also , video is not in focus.How can I make it right.Does this shows that quadalign board is foulty? Any comments PLS? Thank you Miro
Jul 31, 2008 | thank you very much. In my case quadalign board is at rear right corner but it does not have cage just is fitted on vertical aluminum metal sheet plate.I will add ground wire to the board and aluminum plate from machine ground. I will post what is outcome. Thank you much! Miro
Apr 21, 2008 | I think Joseph is referring to Kapton tape. We use aluminum tape secured with a piece of Kapton.
Aug 27, 2007 | Wire prep I know this is a little outside of SMT production, but, I'm hoping someone out there can help me with a small issue. I have a product that I'm building that requires 4 .250" wires, with .125" strip on each end. I solder one end to the board, and one end to a header. Anyone know where I can get .25 wire stripped .125 on each end? My normal wire supplier can't strip wire that small. Hand stripping in house is time consuming, as well as physically difficult. Absent any leads on where to get the wire pre-stripped, any one have any ideas of a creative way to accomplish this en masse? Our
Apr 3, 2007 | If the Bliss carts would help you can cut some money out by buying aluminum bakers carts at your local restaurant supply house for less than $100/each and then buy ESD trays from another local source (Bliss is rather pricy). You will have to hang a chain off the bottom of the cart to conduct to the floor and although aluminum trays are cheaper than ESD trays dont be tempted to use them as aluminum against aluminum friction will give you a bunch of tiny aluminum flakes on your boards (trust me).
Feb 22, 2007 | You are absolutely correct on the aluminum table. I spoke to quickly I guess.
Jan 31, 2007 | to get some additional. What I recall is that they are using "+" mark, 5,8 mm and the spokes are 1,5 mm long (may be +/- 0,1 mm?) Wire is Aluminum, but I do not know the diameter and if bonded by wedge or not. Also about bonder I do not know brand and type and capability. I will come back as I Wire Bonding fiducial mark specifications
Jan 9, 2007 | bonder (ASM ,ESSEC). Some use thermosonic bonding to attach the die to the pad but the most common is by using silver conductive adhesive. Normal COB process flow is : SMT - reflow - wash - Die Attach - adhesive cure( 150 C) - Wire Bond( K&S or Kaijo wirebonder) wire can be aluminum or Au - Glob
Jun 19, 2006 | Wire to board soldering Try to dip that wire with flux before insert to PCB. IT's will come better .
Jun 19, 2006 | Wire to board soldering Hi All, We have a board that's going through our process at the moment, it's 1.6mm thick and has 4 wires soldered into it, these are 10SWG multi stranded wires, i'm finding that it's difficult to get the holes filled with solder as it travels up the wire, customer expects 100% hole fill but the more solder we push in the more the wire takes, also the wire is to be flexible as the board goes into an enclosure and needs to bend pretty close to the board. Has anyone had to deal with anything like this before? Should the wires be screwed into a connector rather than soldered? What are the IPC
Feb 22, 2006 | I have been looking at wave pallets with titanium inserts. I was told about another more recent and less expensive insert using aluminum. The aluminum is coated with some sort of material to prevent the solder from sticking. Is this anodized? Does anyone have experience
Feb 16, 2006 | Aluminum tape Assuming the AL tape shorts the wires for the thermocouple, you effectively have three junctions at the business end of the wire: wire 1 to AL, wire 2 to AL, and wire 1 to wire 2. If the temperature of the junctions wire 1 to AL and wire 2 to AL are the same (same piece of AL), they drop out
Feb 16, 2006 | Aluminum tape Good afternoon, Readings from thermocouple fixed by kapton tape only are inaccurate. This is the fact. At least you need to fix thermocouple with aluminum tape covered by kapton tape. Pete C is right. High temperature solder connection is a preferred method but also it is a destructive one. BR
Feb 15, 2006 | Aluminum tape My understanding is that you get a reading that's the average of all of the jumped points if you jump tc wires with conductive tape. If you're doing multiple parts on a board with varying masses and don't control the attachment method (i.e., how much tape you have touching the wires), you end up
Feb 15, 2006 | Aluminum tape Is this Al tape you guys are talking about insulated? If not, and if it jumps the tc wires, it'll effect your values.
Feb 15, 2006 | radionics
Feb 15, 2006 | Aluminum tape In order of effectiveness / accurate reading: 1. Hi-Temp Soldering 2. ECD's Temprobe or new Flexiprobe http://www.ecd.com 3. Glue, such as SMT adhesive 4. Aluminum tape Capton tape should not be used as it expands at reflow temps.
Feb 15, 2006 | Aluminum tape Can anyone tell me where I can get aluminum tape for holding down thermo couples on PCB's ? Thanks
Jan 22, 2006 | Wire bonding is a die connect methodology that runs either gold or aluminum wires between pads on the integrated circuit to either a lead frame or pads on a printed circuit board. For more look here on Daan Terstegge's excellent link page http://www.smtinfo.net/Db/_Wire%20Bonding.html
Jan 21, 2006 | Wire Bonding What is wire bonding? What are the applications?
Dec 7, 2005 | what is the cause of green decay on the soldered wires Would you by chance be soldering copper to aluminum?
Nov 15, 2005 | Is your IMC purple? [The sure way to tell if you have the 'purple plague'.] Where does the failure occur? * At pad / wire bond * Up wire from the bond Tell us about the aluminum pad. * What is the plating specification? Is that what you actually receive? * What is the silicon content temperature induced IMC in wire bonds? in the aluminum? * Is the aluminum passivated? If so, with what?
Nov 15, 2005 | I have been reading a good deal about IMC (purple plague in particular) in gold wire/aluminum pad wire bonds. My company uses ultrasonic wedge bonding, and for the most part all of our bonding is gold/gold, however we have one particulr part that has several customer-supplied aluminum pad chips temperature induced IMC in wire bonds?
Sep 8, 2005 | Finer pitch: Wedge bonding can be designed and manufactured to very small dimensions, down to 50 mm pitch. Processing speed: Machine rotational movements make the overall speed of the wedge bonding process less than thermosonic ball bonding. Aluminum ultrasonic bonding is the most common wedge bonding process: * Low cost. * Low working temperature. The main advantage for gold wire wedge bonding is the possibility to avoid the need of hermetic packaging after bonding due to the inert properties of the gold. In addition, a wedge bond will give a smaller footprint than a ball bond, which specially benefits the microwave devices with small pads that require a gold wire junction. Look here: http://www.empf.org/empfasis/may05/bond505.htm