Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1993-08-18
1996-06-18
Nguyen, Vinh P.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 731, G01R 3128
Patent
active
055281354
ABSTRACT:
A sheet ceramic package includes a plurality of product units, such as ceramic substrates and circuit substrates for semiconductor devices. The individual product units can be separated from the sheet ceramic package by breaking them apart along snap lines. Each product unit has inner layer conductors for providing external connections to a semiconductor to be packaged therein. A dummy part, with conductor patterns for evaluating the electrical characteristics of corresponding units, surrounds at least partially the periphery of each product unit. Exposed conductors of the product units and the dummy parts are plated by means of electroless plating allowing the product units to be electrically independent of each other because of the absence of the need to apply a uniform plating potential. Semiconductors are packaged into the individual product units and are hermetically sealed. The entire sheet ceramic package of the present invention is then tested, prior to the physical separation of product units, to determine the electrical characteristics of each individual product unit, using the evaluating patterns described above. The electrically independent product units make it unnecessary to break the sheet up into individual product units to test their electrical characteristics. Thus, the present invention eliminates the troublesome process of breaking the sheet into individual units and arranging them on a jig set for individual testing as required by the conventional sheet package. The efficiency of testing the product units thus improves dramatically.
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Ito Kazuhiko
Kawamura Sigeki
Kabushiki Kaisya Sumitomo Kinzoku Ceramics
Morrison Thomas R.
Nguyen Vinh P.
Pastel Christopher R.
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