Device and method for circuit protection during radiation sterilization
First Claim
1. A circuit protection device for protection of sensitive components during high energy radiation sterilization, the device comprising;
- a support substrate that supports the sensitive components;
a protective housing that is hermetically coupled to the support substrate to seal the sensitive components within the protective housing;
wherein the protective housing stops high energy used in the high energy radiation sterilization from damaging the sensitive components from a predetermined exposure level of high energy sterilization; and
an energy absorbing material contained within an area sealed by the protective housing to absorb high energy byproducts produced by the protective housing stopping the high energy used in the high energy sterilization.
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Accused Products
Abstract
A circuit protection device for protection of sensitive components during high energy radiation sterilization that includes a support substrate and a protective housing. The substrate supports the sensitive components. The protective housing is hermetically coupled to the support substrate to seal the sensitive components within the protective housing. Preferably, the protective housing stops high energy used in the high energy sterilization from damaging the sensitive components from a predetermined exposure level of high energy sterilization. The circuit protection device may further include a protective conductor that is coupled to the support substrate on a side which is opposite the protective housing to prevent high energy from entering the opposite side of the support substrate. The circuit protection device can also include an energy absorbing material contained within an area sealed by the protective housing to absorb high energy by products produced by the protective housing stopping the high energy used in the high energy sterilization. Preferably, the support substrate is a circuit board, and the sensitive elements are semiconductors. Also, the high energy sterilization is E-beam sterilization and the high energy are electrons, and the high energy byproducts are x-rays.
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Citations
28 Claims
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1. A circuit protection device for protection of sensitive components during high energy radiation sterilization, the device comprising;
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a support substrate that supports the sensitive components;
a protective housing that is hermetically coupled to the support substrate to seal the sensitive components within the protective housing;
wherein the protective housing stops high energy used in the high energy radiation sterilization from damaging the sensitive components from a predetermined exposure level of high energy sterilization; and
an energy absorbing material contained within an area sealed by the protective housing to absorb high energy byproducts produced by the protective housing stopping the high energy used in the high energy sterilization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A circuit element for use in an electronic device, the circuit element comprising:
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a semiconductor structure, wherein the semiconductor structure has been sterilized by a predetermined dosage of radiation, wherein gain characteristics after radiation sterilization are reduced by less than a predetermined fraction of before radiation sterilization gain characteristics, and wherein after radiation sterilization, characteristics of a collector current and a base current for a given base voltage change in a generally proportional relationship relative to each other. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification