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Baseplate Design for Direct Seal Disclosure Number: IPCOM000042426D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03

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Chiang, S [+details]


A design change is shown to eliminate a LEXAN* cushion 1 used for sealing, as shown in Fig. 1. The colorless appearance of this cushion needs special caution in the manufacturing process. LEXAN has poor chemical property, which can be attacked by the cleaning solution used in assembly operations. Also, LEXAN degrades very fast in temperature/humidity environment. Furthermore, the cushion requirement in the current design leads to a reduction of baseplate lip 2 thickness which weakens the construction and also affects the hermetic seal. The improved design of a direct seal consists of the removal of the LEXAN cushion and the increase of baseplate lip thickness, as illustrated at 3 in Fig. 2.