Non-annular lands

Details Non-annular lands Non-annular lands

1995-06-07

1998-02-03

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

174262, H05K 310

Patent

active

057131279

ABSTRACT:
The present invention increases real estate by providing non-annular lands which do not completely encircle the through holes. The non-annular lands are non-annular, that is they do not extend 360.degree. around the through hole. Preferably the non-annular lands contact no more than one side of the through holes thereby providing real estate not otherwise available using conventional lands. The present invention also relates to a method for producing such Non-annular lands.

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IBM Tech Disclosure vol. 13 No. 1 Jun. 1970, pp. 155-155a by L. F. Miller et al.
IBM Tech Disclosure vol. 15 No. 1 Jun. 1972 p. 319 by J. R. Canizzaro et al.
Semiconductor Lithography Principles, Practices, and Materials by Wayne M. Moreau, 1988 Plenum Press, New York, pp. 7-10 and 27.

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