R-cells containing CDM clamps

Details R-cells containing CDM clamps R-cells containing CDM clamps

2007-09-18

2007-09-18

Dinh, Paul (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000

Reexamination Certificate

active

11126880

ABSTRACT:
A method for producing a chip is disclosed. A first step of the method may involve first fabricating the chip only up to and including a first metal layer such that a core region of the chip has an array of cells, each of the cells having a plurality of transistors. A second step of the method may be to design a plurality of upper metal layers above the first metal layer in response to a custom design created after the first fabricating has started, the upper metal layers interconnecting a plurality of the cells to form an electrostatic discharge clamp at a power domain crossing. A third step may include second fabricating the chip to add the upper metal layers.

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