Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1990-10-09
1997-09-16
Chapman, Mark A.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430315, 522 31, G03C 1725
Patent
active
056679343
ABSTRACT:
A thermally stable photoimaging composition and a method of using the same, especially on circuit boards as a solder mask is provided. The composition includes a polymerizable resin or resin system, a cationic photoinitiator, a solvent, and an optically transparent ceramic filler. Preferably, the composition has a coefficient of thermal expansion of about 28-40 ppm/.degree.C., which closely matches the coefficient of thermal expansion of the solder used on the circuit board components.
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Markovich Voya Rista
Mehta Ashit Arvind
Skarvinko Eugene Roman
Wang David Wei
Chapman Mark A.
International Business Machines - Corporation
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