Rounded contact fingers on substrate/PCB for crack prevention

Electrical connectors – With insulation other than conductor sheath – Plural-contact coupling part

Reexamination Certificate

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Reexamination Certificate

active

07806731

ABSTRACT:
A strengthened semiconductor die substrate and package are disclosed. The substrate may include contact fingers formed with nonlinear edges. Providing a nonlinear contour to the contact finger edges reduces the mechanical stress exerted on the semiconductor die which would otherwise occur with straight edges to the contact fingers. The substrate may additionally or alternatively include plating traces extending at an angle from the contact fingers. Extending at an angle, at least the ends of the plating traces at the edge of the substrate are covered beneath a lid in which the semiconductor package is encased. Thus, when in use with a host device, contact between the ends of the plating traces beneath the lid and contact pins of the host device is avoided.

REFERENCES:
patent: 3984166 (1976-10-01), Hutchison
patent: 6319065 (2001-11-01), Farnworth et al.
patent: 6461892 (2002-10-01), Beroz
patent: 2001/0020741 (2001-09-01), Masayuki et al.
patent: 2002/0020741 (2002-02-01), Sakaguchi
patent: 2002/0055282 (2002-05-01), Eldridge et al.
patent: 2003/0111737 (2003-06-01), Katagiri et al.
patent: 2004/0026774 (2004-02-01), Corisis et al.
patent: 2004/0164385 (2004-08-01), Kado et al.
patent: 2005/0156299 (2005-07-01), Vonstaudt
patent: 2007/0132066 (2007-06-01), Takiar et al.
patent: 2007/0152319 (2007-07-01), Takiar et al.
U.S. Appl. No. 11/321,929, filed Dec. 29, 2005, Takiar et al.
Office Action dated Oct. 2, 2007 in U.S. Appl. No. 11/321,929, filed Dec. 29, 2005.
Response to Office Action dated Nov. 16, 2007, U.S. Appl. No. 11/321,929.
Office Action dated May 30, 2008 in U.S. Appl. No. 11/321,929.
Response to Office Action dated Aug. 29, 2008 in U.S. Appl. No. 11/321,929.
Notice of Allowance dated Nov. 5, 2008 in U.S. Appl. No. 11/321,929.

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