公开(公告)号：CA1135871A

公开(公告)日：1982-11-16

申请号：CA336708

申请日：1979-10-01

Applicant: IBM

Inventor： CHAUDHARI PRAVEEN ,  KIESSLING JOHN B ,  PERLMAN DAVID J ,  TYNAN EUGENE E ,  VON GUTFELD ROBERT J

IPC: H01R43/00 ,  B23K26/22 ,  H01L21/60 ,  H01R43/02 ,  H05K3/32 ,  H05K3/00

Abstract: METHOD OF BONDING WIRES TO PASSIVATED CHIP MICROCIRCUIT CONDUCTORS A wire is positioned in intimate contact with a microcircuit hip above a conductor line or pad on the chip. The line is protected by a thin film layer of passivating or insulating material deposited upon the chip. A short pulse, focussed, energy source such as a laser beam drills a hole through or on the edge of the wire, and also opens a hole drawn through the insulating material to expose the conductor line. Then energy is directed upon the portion of the wire surrounding the hole to melt metal from the wire down into the hole which coalesces with molten metal below to form an electrical and mechanical bond of the wire to the line. YO978-042

公开(公告)号：CA1039828A

公开(公告)日：1978-10-03

申请号：CA198072

申请日：1974-04-19

Applicant: IBM

Inventor： TYNAN EUGENE E ,  VON GUTFELD ROBERT J

IPC: G01J1/00 ,  G01J5/00 ,  G01J5/20 ,  G01S3/78 ,  H01L37/00 ,  G01J5/14

Abstract: A light detector consisting of a thin film of metallic (or conducting) material having an induced anisotropy in conjunction with means for establishing a temperature gradient in the film in a direction normal to the plane of the film is disclosed. When thin films of molybdenum and tungsten are excited by a pulsed laser light at normal incidence to the film, transverse thermoelectric voltages are generated. Output voltages across a 50 ohm load of 10 millivolts have been observed for an incident laser pulse of approximately 1 KW. Wave lengths in the range of 0.46-1.06.mu.m and pulse widths of approximately 3 to 300 nanoseconds produce output voltages. A correlation between intrinsic film stress and output voltage indicates that stress (one of induced anisotropy) in the metal film introduced during deposition or externally induced anisotropy such as can be produced by a magnetic field in magnetic materials gives rise to a nonscalar absolute thermoelectric power even though the metal films are usually considered to be isotropic in their transport properties. The output from the detector, in terms of polarity, may be reversed by reversing the direction of light incidence. Also, the direction and magnitude of the output may be controlled by adjusting the position of the metallic film relative to a pair of contacts disposed in sliding relationship with the metallic film. While not necessary to the practice of the present invention, an electrically insulating substrate is preferably used to cause a better temperature gradient normal to the plane of the film. In general, the response time of the films is dependent on the laser pulse width.

公开(公告)号：CA969594A

公开(公告)日：1975-06-17

申请号：CA145633

申请日：1972-06-26

Applicant: IBM

Inventor： TYNAN EUGENE E ,  WELBER BENJAMIN

IPC: H01J17/49