Technical Library | 2013-12-05 17:09:03.0
The functionality of electronic devices continues to increase at an extraordinary rate. Simultaneously consumers are expecting even more and in ever smaller packages. One enabler for shrinking electronics has been the flexible circuit board that allows the circuit board to fit a wide variety of shapes. Flexible printed circuits (FPC) have the capability to be very thin and can have unpackaged components directly attached using surface mount technology (SMT) and flip chip on flex technologies. Bare die can also be thinned and attached very close to the circuit board. However one caveat of high density flexible circuit boards with thin die is that they can be very fragile. The use of back side films and underfill can protect the die making circuits more robust. For underfill to work well it requires good adhesion to the circuit board which can mean that flux residues under the die normally must be removed prior to underfilling.
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
Industry News | 2009-09-17 17:02:12.0
EAST HANOVER, NJ – Zymet has introduced a new reworkable underfill encapsulant, CN-1728, designed to underfill Package-on-Package (POP) assemblies. Underfilled POP’s have greater difficulty in passing thermal cycle tests than underfilled BGA’s. Compared to earlier generation underfills, CN-1728 has a lower coefficient of thermal expansion and higher Tg, and better compatibility with flux residues, both of which contribute to its superior thermal cycle performance.
Industry News | 2012-01-13 13:20:53.0
Zymet has introduced a new reworkable underfill encapsulant, CN-1736, designed to underfill 0.4-mm pitch Package-on-Package (POP) assemblies. It has low viscosity and a lower CTE than its predecessors. Plus it has greater flux compatibility, making it suitable for use with a broader range of solderpastes and tacky fluxes.
Industry News | 2010-03-17 18:31:55.0
EAST HANOVER, NJ – Zymet has introduced a new silica-filled reworkable board-level underfill encapsulant, X2825, whose coefficient of thermal expansion, CTE, is 26 ppm/°C. The underfill enhances drop and shock test reliability and, compared to higher CTE underfills, provides superior thermal cycle performance.
Industry News | 2013-02-08 23:26:44.0
Zymet has introduced a new reworkable underfill encapsulant, CN-1751-4, that is extraordinarily crack resistant, to withstand flexing experienced by flexible printed circuitry or drops and shocks of very thin printed circuit assemblies.
Industry News | 2011-04-07 20:23:54.0
Zymet Inc. has introduced a reworkable edgebond adhesive, UA-2605, that improves thermal cycle performance of CBGAs and plastic BGAs. In one trial, UA-2605 tripled the 0°C to +100°C performance of a CBGA, to nearly 2500 cycles. Previously, an underfill was needed to achieve this level of performance.
http://yincae.com/index.html YINCAE SMT 256 Dipping Process YINCAE SMT 266 Jetting Process
SMT256EP solderable adhesive is self-leveling and self-soldering adhesives, which has been designed for high temperature Pb-free application. By comparison with conductive adhesives (Ag), SMT256EP solderable adhesive has higher stable electrical and
Industry News | 2015-04-21 16:39:45.0
Metcal is pleased to announce that it was awarded a 2015 SMT China Vision Award in the category of Repair & Rework for its APR-2000-SCS Scarab Site Cleaning System. The award was presented to the company during an April 21, 2015 ceremony at the Shanghai World Expo Exhibition & Convention Center during NEPCON China.
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