| June 6, 2018
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Every now and then an error will occur at the most inopportune time; in this case it was in the design phase of the printed circuit board. When circuit boards are in the proto-type phase, it is not uncommon for sockets to be used at BGA sites. Many of these sockets rely on a flat surface that precludes the use of solder mask. Eliminating solder mask is fine until it is time to move on with production when BGA components will be soldered directly eliminating the ...
Feature Story
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Board flexing has recently started to occur on one of our circuit board assemblies. This assembly has a 40 mm PoP BGA component. The BGA has an integrated heat sink. The problem with the boards bowing, or curving upwards towards the middle of the board, has just started ...
Ask the Experts
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The paper addresses the rework and reball challenges of a specific WLP case study, and suggests improvements for maintaining the true failure signature. Rework and reball recipes were successfully developed for a WLP, and optical microscopy and C-mode scanning acoustic microscopy were used to ...
Technical Library
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Performing cuts on external and internal connections can be simple or extremely complex. Quite often, a rework department is confronted with the task of cutting, rather than establishing, connections. Why do these cuts need to be made? Why do connections on or in boards need to be severed? Design changes ...
Feature Story
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Engineers worldwide are busy developing alternative ways to provide greater memory storage capacity on even smaller computer chips. Previous research into two-dimensional atomic sheets for memory storage has failed to uncover their potential - until now ...
Technology Briefing
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"You're getting pretty good at this stress management thing."
Copyright © Randy Glasbergen
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Trivia
What is the name for the quality standard that is represented by no more than 3.4 parts per million defects?
See the answer below.
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Quote of the Week
"Give me a stock clerk with a goal and I'll give you a man who will make history. Give me a man with no goals and I'll give you a stock clerk."
J.C.Penney
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