Glass manufacturing – Processes – Operating under inert or reducing conditions
Patent
1990-08-29
1991-08-27
Lindsay, Robert L.
Glass manufacturing
Processes
Operating under inert or reducing conditions
65 26, 65 36, 357 29, 357 74, 357 80, 437 19, 437218, C03Z 2900
Patent
active
050430041
ABSTRACT:
An assembly structure and a method for making a ceramic lid for a hermetically sealed package for an EPROM circuit are disclosed. The assembly structure includes, in combination, a ceramic lid, a UV transparent lens, and two fixtures for supporting the lens in the lid. The two fixtures are configured to contact the lens only at predetermined areas which are not crucial to UV transparency. The UV transparent lens is hermetically sealed to the ceramic lid by firing the assembly structure. The assembly structure prevents the lens from attracting foreign particulate matter during firing, thereby leaving the surfaces of the lens clean. The method provides a ceramic lid having a UV transparent lens hermetically sealed thereto, which finds wide use in integrated circuit packages for high-density EPROM's because of the untainted surfaces of the lens.
REFERENCES:
patent: 3069876 (1962-12-01), Certa et al.
patent: 3768991 (1973-10-01), Rogers
patent: 4100675 (1978-07-01), Landsittel
patent: 4291815 (1981-09-01), Gordon et al.
patent: 4312117 (1982-01-01), Robillard et al.
patent: 4326214 (1982-04-01), Trueblood
Kyocera America, Inc.
Lindsay Robert L.
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