Leadframe tip arrangement designing method

Details Leadframe tip arrangement designing method Leadframe tip arrangement designing method

1998-03-20

2000-10-17

Lintz, Paul R.

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

716 19, 257672, 257673, 257666, 438123, 438121, G06F 1750

Patent

active

061347000

ABSTRACT:
First, a reference point on a die pad and a leadframe tip arrangement line are set. A plurality of isosceles triangles having the same base length are set so that their apices are located at the reference point. A given number of isosceles triangles are arranged inside the leadframe tip arrangement line by adjusting the base length. The base length of the isosceles triangles is employed as a uniform lead pitch, and a uniform lead width is then determined. The base length of the isosceles triangles is calculated by using the successive bisection algorithm.

REFERENCES:
patent: 5442230 (1995-08-01), Chillara et al.
patent: 5594626 (1997-01-01), Rostoker et al.
patent: 5902119 (1999-05-01), Taki et al.

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