Apr 22, 2009 | P. John Shiloh, John Malboeuf.
An optimal reflow profile is one of the most critical factors in achieving quality solder joints on a printed circuit board (PCB) assembly with surface mount components. A profile is a function of temperatures applied to the assembly over time. When graphed on a Cartesian plane, a curve is formed that represents the temperature at a specific point on the PCB, at any given time, throughout the reflow process....
Publisher: DDM Novastar
Turnkey SMT assembly solutions, manual & automated stencil printers, manual & automatic pick & place systems with dispensers, wave solder & selective solder machines, lead free solder reflow ovens, component counters, & thru-hole
King of Prussia, Pennsylvania, USA
Apr 16, 2009 | Dr. Henry Jurgens; Valor Division of Mentor Graphics Corp.
The worldwide electronics industry has sales of $750 billion, two thirds of which is accounted for by PCB assembly. PCB manufacturing is characterised by an obsessive drive for increased productivity in the context of three significant industry drivers: shorter product lifecycles, more complexity, outsourcing...
Publisher: Mentor Graphics
Apr 09, 2009 | ECD
Evidence has come to light that increased solder process temperatures, specifically for lead free solder, are dramatically shortening life expectancy of components; failures do not show up during initial test, but much later on in the products life, ...
Publisher: Electronic Controls Design Inc. (ECD)
ECD is recognized worldwide for its leadership and expertise in thermal monitoring and analysis technology. The company is a pioneer in the design, development, and manufacturing of advanced thermal profiling systems and software.
Milwaukie, Oregon, USA
Apr 09, 2009 | Tom Morris, Applications Engineering Manager; T.T. Electronics IRC Advanced Film Division.
Advances in solid state light emitting diodes (LEDs) over the last several years have opened new applications for these devices. Traditionally used only in low power, low light output applications, modern high power LEDs are finding their way into a wide variety of applications. LEDs for lighting applications offer several advantages over traditional incandescent lighting methods...
IRC has been a leader in resistor technology, including the industry's comprehensive range of current sense resistors, precision discrete and networks, integrated passive components, and specialized power resistors.
Corpus Christi, Texas, USA
Mar 27, 2009 | Dr. Benlih Huang, Dr. Hong-Sik Hwang, and Dr. Ning-Cheng Lee; Indium Corporation of America.
The Sn-Ag-Cu (SAC) alloys have been considered promising replacements for the lead-containing solders for the microelectronics applications. However, due to the rigidity of the SAC alloys, compared with the Pb-containing alloys, more failures have been found in the drop and high impact applications for the portable electronic devices, such as the personal data assistant (PDA), cellular phone, notebook computer..etc...
Publisher: Indium Corporation
Mar 25, 2009 | Mike Weekes.
Have you ever been asked to lead a project to fix a problem, implement a new technology or some other initiative? It can be intimidating. Just because you, yourself are a good problem-solver, doesn't mean you have the capacity or drive to work with a team to achieve a goal. Often the secret to success lies in up-front preparation. Here are ten things you can do to help assure that when the project is done, it will have the effective results your leadership team is looking for....
Publisher: Whataboutquality LLC
Mar 25, 2009 | Thomas Kugelstadt, Senior Systems Engineer; Texas Instruments Inc.
This article presents design guidelines for helping users of HDMI mux-repeaters to maximize the device's full performance through careful printed circuit board (PCB) design. We'll explain important concepts of some main aspects of high-speed PCB design with recommendations. This discussion will cover layer stack, differential traces, controlled impedance transmission lines, discontinuities, routing guidelines, reference planes, vias and decoupling capacitors....
Publisher: Texas Instruments
Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers real world signal processing requirements. In addition to Semiconductor, the company includes the Educational & Productivity Solutions business. T
Dallas, Texas, USA
Mar 19, 2009 | Michael Konrad, President; Aqueous Technologies Corporation
Over the past several years, post-reflow defluxing of circuit assemblies has gained in popularity. Microminiaturization of components and boards, combined with higher expected reliability and increased product liability, have contributed to the prominence of defluxing. Lead-free solder paste - with its higher reflow temperatures and negative effects on flux - increase the likelihood of post-reflow defluxing to increase a product's reliability and aesthetic appearance....
Publisher: Aqueous Technologies Corporation
Mar 13, 2009 | Lars Wallin, Project Manager Live Production Events at EP shows at the Stockholm Fair IPC European Representative.
Open product reliability testing in Stockholm, Sweden in January as part of a live production event generated some quite startling results. It was apparent that many components simply cannot handle the high reflow temperatures of a lead-free soldering process, and that many surface-mount machine suppliers are battling significant problems with QFN packages and other components that are mounting edgeways (bill boarding). However, some suppliers have achieved good results....
Publisher: Mycronic Technologies AB
Mar 05, 2009 | Mike Weekes.
In a recent survey of 89 organizations conducted by Whataboutquality.com, respondents were asked what few key characteristics defined quality, in the eyes of their customer, the most popular response was: the product or service met my requirements. The next two most popular responses were: it worked like I expected and it was a good value, worth what I paid for it (...) So how do you continue to exceed customer expectations and simultaneously reduce costs? There are two paths to take. You can find and reduce the variation in your process and you can eliminate as much of the non-value-added waste in your operation....
Publisher: Whataboutquality LLC