Fishing – trapping – and vermin destroying
Patent
1995-05-15
1997-09-23
Niebling, John
Fishing, trapping, and vermin destroying
437974, 437 20, H01L 3118
Patent
active
056703830
ABSTRACT:
A method of forming a planar semiconductor device, such as an array of APDs, includes the steps of doping a substantially planar block of n type semiconductor material with a p type dopant in accordance with a selected pattern to form a plurality of n type wells in the block surrounded by a foundation of p type semiconductor material. Each n type well is disposed so as to respectively adjoin a first surface of the block and such that a respective p-n junction is formed between the n type material in the well and the p type material foundation. The n type semiconductor material in each well has a substantially constant concentration of n type dopant throughout the n type material; the concentration of p type dopant in the foundation has a positive gradient extending from the p-n junction towards the second surface such that the peak surface electric field of the p-n junction in each well is less than the bulk electric field of the same p-n junction.
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Castleberry Donald Earl
Ishaque Ahmad Nadeem
Menditto Peter
Piccone Dante Edmond
Rougeot Henri Max
General Electric Company
Ingraham Donald S.
Mulpuri S.
Niebling John
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