Form-in place EMI gaskets
First Claim
1. An EMI shielded substrate comprisinga first electrically conductive substrate, a second electrically conductive substrate adjacent to the first substrate, and a single layer formed in place electrically conductive elastomeric gasket formed on and bonded to a predetermined portion of the first substrate so as to provide an electrical connection and EMI shielding between the first and second substrates, said gasket having a Shore A hardness of from about 5 to about 90, a force/deflection value of from about 0.2 pounds/inch to 15.0 pounds/inch, a bulk electrical resistance value of from about 0.005 ohms cm to 0.1 ohms cm, a compression set value of from about 5% to 50%, and an EMI sheilding effectiveness of from about 10-100 dB at a frequency range from about 10 MHz to about 12 GHz.
1 Assignment
0 Petitions
Accused Products
Abstract
A form-in-place, electrically-conductive gasket is disclosed. The gasket, foamed, gelled or unfoamed is made of one or more elastomer resins, such as silicone urethane and/or thermoplastic block copolymers and is either filled with a conductive filler and lined onto a desired substrate or lined onto the substrate unfilled and then coated with a conductive outer layer, such as a silver filled elastomer or a conductive flocked layer. A process and system for making the gaskets are also disclosed.
72 Citations
11 Claims
-
1. An EMI shielded substrate comprising
a first electrically conductive substrate, a second electrically conductive substrate adjacent to the first substrate, and a single layer formed in place electrically conductive elastomeric gasket formed on and bonded to a predetermined portion of the first substrate so as to provide an electrical connection and EMI shielding between the first and second substrates, said gasket having a Shore A hardness of from about 5 to about 90, a force/deflection value of from about 0.2 pounds/inch to 15.0 pounds/inch, a bulk electrical resistance value of from about 0.005 ohms cm to 0.1 ohms cm, a compression set value of from about 5% to 50%, and an EMI sheilding effectiveness of from about 10-100 dB at a frequency range from about 10 MHz to about 12 GHz.
-
9. An EMI shielded substrate comprising:
-
a substrate having an electrically conductive surface;
a cover for the substrate, the cover having an electrically conductive surface which corresponds to and is in register with the conductive surface of the substrate; and
a single layer formed in place electrically conductive eleastomeric gasket formed on and bonded to a predetermined portion of the conductive surface of the substrate or cover so as to provide an electrical connection and an EMI shielding between the substrate and cover upon mating of the cover to the substrate, said gasket having a Shore A hardness of from about 5 to about 90, a force/deflection value of from about 0.005 ohms cm to 0.1 ohms cm, a compression set value of from about 5% to 50% and an EMI shielding effectiveness of from about 10-1000 dB at a frequency range from about 10 MHz to about 12 GHz. - View Dependent Claims (10, 11)
-
Specification