GEORGE CHARLES EPP
Pilots at Oak Hl Rd, Van Alstyne, TX
License number
Texas A0550467
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
808 Oak Hill Rd, Van Alstyne, TX 75495
Professional information
Inspection System And Method For Leads Of Semiconductor Devices
US Patent:
5956134, Sep 21, 1999
Filed:
Apr 28, 1998
Appl. No.:
9/069056
Inventors:
Rajiv Roy - Plano TX
Michael D. Glucksman - Plano TX
Weerakiat Wahawisan - Carrollton TX
Paul Harris Hasten - Garland TX
Charles Kenneth Harris - Dallas TX
George Charles Epp - Van Alstyne TX
Michael D. Glucksman - Plano TX
Weerakiat Wahawisan - Carrollton TX
Paul Harris Hasten - Garland TX
Charles Kenneth Harris - Dallas TX
George Charles Epp - Van Alstyne TX
Assignee:
Semiconductor Technologies & Instruments, Inc. - Dallas TX
International Classification:
G01B 1124
US Classification:
3562375
Abstract:
A system for transporting and inspecting, seriatim, semiconductor devices with plural prong type or solder ball type leads includes a head for transporting the semiconductor devices from one support structure, such as a tray or tube, to a second support structure, such as a tray or tape, and wherein two dimensional and three dimensional measurements of the positional accuracy of the leads is carried out during the transport process. The inspection apparatus is interposed in the transport path and includes a first optical sensor such as a CCD camera oriented to capture a two dimensional image of the semiconductor device package and compare the image with a predetermined two dimensional image store in a central processing unit (CPU). A high intensity light source, such as a laser, generates a plane of light which is reflected off of the semiconductor device leads to a second optical sensor, also comprising a CCD camera, wherein a so-called three dimensional image is generated to be compared by the CPU with predetermined or calculated positional relationships of the leads to establish coplanarity of the lead tips, or lack thereof. The system includes a sensor located such that the semiconductor device is centered in a field of view of the cameras to capture the respective images.
Voice Coil Programmable Wire Tensioner
US Patent:
5114066, May 19, 1992
Filed:
Nov 20, 1990
Appl. No.:
7/616035
Inventors:
Gonzalo Amador - Dallas TX
Randy O. Burrows - Lubbock TX
George C. Epp - Van Alstyne TX
Randy O. Burrows - Lubbock TX
George C. Epp - Van Alstyne TX
Assignee:
Texas Instruments Incorporated - Dallas TX
International Classification:
B23K 3700
US Classification:
228 45
Abstract:
A voice coil actuated wire tensioner is used on a wire bonder in conjunction with a primary wire clamp to provide accurate control of the bond wire and looping of the bond wire between ball bonding of one end of a bond wire and stitch bonding of the other end of the bond wire.