Henkel offers innovative capillary flow underfill encapsulants for flip-chip, CSP and BGA devices. These are highly flowable, high purity, onecomponent encapsulants. They form a uniform and void-free underfill layer to improve reliability performance
For encapsulation of wirebonded IC’s Zymet's glob top and dam-and-fill encapsulants are UV curable, yet they have properties similar to conventional heat cured encapsulants, high Tg’s and low CTE’s. With UV cure, curing is performed quickly, inline
Electronics Forum | Mon Nov 27 08:05:50 EST 2006 | davef
There is no standard for a strain gage measurement of allowable deflection of a board or a fixture. It's possible that your fixture is causing the BGA cracking that you see. What protion of the BGA is cracking? If it is the solder connection, sear
Electronics Forum | Mon May 16 22:59:40 EDT 2005 | davef
We believe your problem is caused by the mismatch in CTE of the material ised in your BGA. In fact, this "potato chipping" [where the corners curl-up] is present in all BGA. The issue is the matter of degree. [Mismatching CTE is how old thermostats
Industry News | 2018-08-02 19:48:46.0
IPC – Association Connecting Electronics Industries, the global industry association representing the $2 trillion global electronics industry, is applauding the U.S. Congress for sending legislation to President Trump that will strengthen workforce education and training efforts. The President signed the Strengthening Career and Technical Education for the 21st Century Act (the Perkins CTE Act) on Tuesday.
Industry News | 2021-01-17 17:50:26.0
The Assembly Division of MacDermid Alpha Electronics Solutions announces the release of ALPHA HiTechUnderfills and Cornerfills with high Transition Glass Temperature (Tg), Low Coefficient Thermal Expansion (CTE), and excellent thermal cycling (TCT) performance. The attributes provide formulation flexibility to enhance product performance in various applications.
Technical Library | 2020-01-01 17:06:52.0
The majority of electronic failures occur due to thermally induced stresses and strains caused by excessive differences in coefficients of thermal expansion (CTE) across materials.CTE mismatches occur in both 1st and 2nd level interconnects in electronics assemblies. 1st level interconnects connect the die to a substrate. This substrate can be underfilled so there are both global and local CTE mismatches to consider. 2nd level interconnects connect the substrate, or package, to the printed circuit board (PCB). This would be considered a "board level" CTE mismatch. Several stress and strain mitigation techniques exist including the use of conformal coating.
Technical Library | 2008-02-04 12:13:38.0
Engineers are always striving to make a lighter, faster and stronger PCB. In order to achieve their designs, engineers must turn to alternative materials to enhance their designs. There are many materials that allow for thermal, coefficient of thermal expansion (CTE) and rigidity. Many times if a material enables an engineer to have CTE they will have to sacrifice thermal. Currently carbon composite laminates are being used in order to achieve an ideal PCB with thermal, CTE and rigidity with almost no weight premiums.
http://yincae.com/index.html YINCAE SMT 256 Dipping Process YINCAE SMT 266 Jetting Process
Meeting Heat And CTE Challenges Of PCBs And ICs News Forums SMT Equipment Company Directory Calendar Career Center Advertising About FREE Company Listing! Meeting Heat And CTE Challenges Of PCBs And ICs The electronics industry
Meeting Heat And CTE Challenges Of PCBs And ICs News Forums SMT Equipment Company Directory Calendar Career Center Advertising About FREE Company Listing! Meeting Heat And CTE Challenges Of PCBs And ICs The electronics industry
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/proceedings_abstract.cfm?PROC_ID=4722
. ATC test results for two different interposers (Si and Glass with High CTE) will be discussed. Key Words: Cu Pillars, Lead-Free Solder Alloys
Imagineering, Inc. | https://www.pcbnet.com/blog/the-role-of-pcb-assembly-and-fabrication-in-the-aerospace-industry/
) and an in-plane CTE of about 15 ppm/°C. These thermal properties resemble ceramic-bodied microcircuits that manufacturers typically solder to a PCB
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