Patent ID: 8448101

Claim:
A device for designing vertical power transistors, the device comprising: a plurality of different partial design pieces so as to include a first end piece with a gate connection at least one central piece and a second end piece and an edge structure each partial design piece comprising at least one individual transistor cell, each individual transistor cell being defined by design parameters representing at least a thickness of a gate dielectric and a design length thereof; several design structures for each of said plurality of different partial design pieces, each design structure corresponding to a respective one of said different partial design pieces comprising said at least one individual transistor cell, each design structure being defined by a first partial gate dielectric piece having a first length and a first thickness and by a second partial gate dielectric piece having a second length and a second thickness, said second thickness being larger than the first thickness, said first length and said second length being variables, a ratio of the first length to said second length being different and while a total length of said first and second lengths being is constant for at least some of the design structures; whereby a transistor design of a vertical power transistor is put together from said plurality of partial design pieces; and allowing at least a capacity calculation and a transistor resistance determination as a function of the first and second lengths.