Patent ID: 6700186
Filing Date: 2004-03-02
Classification: H01L

Abstract:
A lead frame for a semiconductor device, the lead frame comprising:a sheet having oppositely facing sides and a thickness between the oppositely facing sides, the sheet comprising first and second unit lead frames, each said unit lead frame comprising a support for a semiconductor chip and at least one lead spaced from the support, the sheet further comprising a tie bar network which connects a) the support to the at least one lead on each of the first and second unit lead frames and b) the first and second unit lead frames each to the other, the sheet having a dividing line along which the sheet can be cut to separate the first and second unit lead frames from each other, the tie bar network comprising at least one tie bar extending along a substantial length of the dividing line, the support having a first thickness between the oppositely facing sides of the sheet, the at least one tie bar having a second thickness between the oppositely facing sides of the sheet over a substantial length of the dividing line that is less than the first thickness, the at least one lead on at least one of the unit lead frames having a length, a width, and a thickness, the at least one lead on the at least one unit lead frame having an undercut extending along a substantial length of the at least one lead on the at least one unit lead frame.