Method of testing semiconductor chips with reusable test package
First Claim
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1. A method of testing a semiconductor device having electrical contacts, comprising the steps of:
- forming a semiconductor device test package, the package forming step including the steps of;
placing a layer of a flexible electrical insulator having in it electronic circuitry on a rigid substantially planar substrate, removing a portion of the substrate, such that a portion of the flexible insulator layer lies above the removed portion of said rigid substrate;
forming interconnect pads to match locations of said electrical contacts;
comprising providing metalized particles protruding from said interconnect pads on a surface of the layer lying above the removed portion of the rigid substrate;
placing the semiconductor device on the semiconductor device test package so that the electrical contacts contact the interconnect pads; and
urging the semiconductor device toward the interconnect pads to cause the metallized particles to pierce surfaces of said electrical contacts, controlling the urging force to be sufficient to cause the flexible electrical insulator to deflect to increase uniformity of the depth to which the metallized particles pierce the surface of the electrical contacts for test purposes.
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Abstract
A method for testing semiconductor chips using a test package having electrical contacts which have in them metallized particles which pierce the surface of the pads of a semiconductor chip, the chips being mounted on a flexible substrate which can deflect to increase the uniformity of the level to which the metallized particles pierce the surface of the pads of the semiconductor chip. If the chip tests as "good", pressure can be applied to increase the piercing depth, thereby allowing the test package to be used as a permanent package.
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Citations
12 Claims
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1. A method of testing a semiconductor device having electrical contacts, comprising the steps of:
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forming a semiconductor device test package, the package forming step including the steps of; placing a layer of a flexible electrical insulator having in it electronic circuitry on a rigid substantially planar substrate, removing a portion of the substrate, such that a portion of the flexible insulator layer lies above the removed portion of said rigid substrate; forming interconnect pads to match locations of said electrical contacts;
comprising providing metalized particles protruding from said interconnect pads on a surface of the layer lying above the removed portion of the rigid substrate;placing the semiconductor device on the semiconductor device test package so that the electrical contacts contact the interconnect pads; and urging the semiconductor device toward the interconnect pads to cause the metallized particles to pierce surfaces of said electrical contacts, controlling the urging force to be sufficient to cause the flexible electrical insulator to deflect to increase uniformity of the depth to which the metallized particles pierce the surface of the electrical contacts for test purposes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification