Robert D Newsome

US Patent:

49723111, Nov 20, 1990

Filed:

Aug 15, 1988

Appl. No.:

7/232003

Inventors:

William J. Holdgrafer - Burlington NJ
Douglas L. Gauntt - Mickleton NJ
Robert B. Newsome - Sellersville PA

Assignee:

Kulicke and Soffa Industries Inc. - Willow Grove PA

International Classification:

G01B 900
G06F 1546
G06K 900
H04N 700

US Classification:

36416701

Abstract:

Apparatus and a method of correcting for repeatable positioning errors in an X-Y table is provided. An accurate mask is provided having a plurality of repetitive recognizable patterns thereon which is placed in the field of view of a pattern recognition system of a semiconductor processing machine to be calibrated. The semiconductor processing machine is programmed to perform a series of steps which steps the X-Y table to positions which are supposedly accurate relative to a fixed point. At each of the stepped points, the plurality of repetitive recognizable patterns on the mask are electronically scanned by the pattern recognition system and the deviation of the position of the pattern relative to the desired position is calculated to provide X and Y deviations from the theoretical position of the X-Y table. These deviations of points along a linear X and a linear Y axis are employed to calculate the actual deviations of other pattern points for all of the possible positions of movement along other X and Y axes.

US Patent:

47638265, Aug 16, 1988

Filed:

May 14, 1986

Appl. No.:

6/862988

Inventors:

Frederick W. Kulicke - Horsham PA
David A. Leonhardt - Norristown PA
Robert B. Newsome - Hatfield PA
Richard D. Sadler - Quakertown PA
Gary S. Gillotti - Telford PA

Assignee:

Kulicke and Soffa Ind., Inc. - Willow Grove PA

International Classification:

B23K 3700

US Classification:

228 45

Abstract:

An improved automatic wire feed system for supplying a fine wire to a capillary bonding tool or to a wedge bonding tool is provided. The wire feed system includes a novel wire feed slack loop device which is mounted on the wire bonder between the bonding tool and the source of fine wire. The novel wire feed slack loop device comprises a pair of sector plates which are closely spaced apart from each other to provide an air space therebetween for receiving the fine wire. Compressed air is supplied to the air space between the sector plates and is directed radially outward by a diffuser shim plate which forces the wire to form into a uniform circular shape in the air space. Sensor means are provided at the outer perimeter of the sector plates which sense the position of the fine wire and supplies a signal to control means which turns off the rotation of the drive motor. Turning off the gas provides a slack wire loop with sufficient fine wire to make an interconnection on a semiconductor device without creating tension or compression of the wire at the bonding tool.