Fishing – trapping – and vermin destroying
Patent
1995-05-31
1997-07-01
Niebling, John
Fishing, trapping, and vermin destroying
437 48, 257910, 257390, 257391, H01L 21265
Patent
active
056438168
ABSTRACT:
A read-only memory device having a memory array composed of memory cells formed as P-N junction diodes when programmed to be in an ON state and as blocking capacitors when remaining in an OFF state. A number of insulators are placed on the surface of a P-type substrate isolated from each other and aligned along one first defined direction. Each of a number of N-type bit lines is located on the P-type substrate between every neighboring pair of insulators. Each of a number of switch control layers is located on a corresponding one of the N-type bit lines. Each of a number of P-type word lines is located on the insulators along a direction that is substantially perpendicular to the first direction. A punch-through voltage is applied through the switch control layers at selected memory cell locations, thereby programming the memory cell at such locations to be in an ON state. All other memory cells locations keep their switch control layers intact and are thereby programmed to be in an OFF state.
REFERENCES:
patent: 4502208 (1985-03-01), McPherson
patent: 5480823 (1996-01-01), Hsu
patent: 5510288 (1996-04-01), Hong
Hong Gary
Hsu Chen-Chung
Booth Richard A.
Niebling John
United Microelectronics Corp.
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