Method of increasing a free carrier concentration in a...

Semiconductor device manufacturing: process – Introduction of conductivity modifying dopant into... – By application of corpuscular or electromagnetic radiation

Reexamination Certificate

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C438S057000, C257SE21133, C257SE21347, C257SE21134, C257SE21135

Reexamination Certificate

active

07485554

ABSTRACT:
A method of selectively heating a predetermined region of a semiconductor substrate includes providing a semiconductor substrate, selectively focusing a free carrier generation light on only a predetermined region of the semiconductor substrate, irradiating the free carrier generation light on the predetermined region of the semiconductor substrate to increase a free carrier concentration within the predetermined region of the semiconductor substrate, wherein the free carrier generation light causes the predetermined region to increase in temperature by less than a temperature necessary to change the solid phase of the predetermined region, and irradiating the semiconductor substrate with a heating light to selectively heat the predetermined region of the semiconductor substrate.

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