Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode
Reexamination Certificate
2008-07-15
2008-07-15
Soward, Ida M (Department: 2822)
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Having insulated electrode
C257S069000, C257S083000, C257S084000, C257S088000, C257S093000, C257S117000, C257S118000, C257S187000, C257S204000, C257S222000, C257S290000, C257S291000, C257S293000, C257S294000, C257S446000, C257S462000
Reexamination Certificate
active
07400004
ABSTRACT:
Regions of an integrated circuit are isolated by a structure that includes at least one isolating trench on the periphery of an active area. The trench is deep, extending at least about 0.5 μm into the substrate. The isolating structure prevents photons and electrons originating in peripheral circuitry from reaching the active area. Where the substrate has a heavily-doped lower layer and an upper layer on it, the trench can extend through the upper layer to the lower layer. A thermal oxide can be grown on the trench walls. A liner can also be deposited on the sidewalls of each trench. A fill material having a high-extinction coefficient is then deposited over the liner. The liner can also be light absorbent so that both the liner and fill material block photons.
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Cole Bryan G.
Sorensen Troy
Dickstein & Shapiro LLP
Micro)n Technology, Inc.
Soward Ida M
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