DALE DUANE WALZ
Pilots at Gibralter Dr, Colorado Springs, CO
License number
Colorado A2401084
Issued Date
Dec 2015
Expiration Date
Dec 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
7680 Gibralter Dr, Colorado Springs, CO 80920
Professional information
Integrated Circuit Packaging With Improved Heat Transfer And Reduced Signal Degradation
US Patent:
5307237, Apr 26, 1994
Filed:
Aug 31, 1992
Appl. No.:
7/938064
Inventors:
Dale D. Walz - Colorado Springs CO
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
H05K 720
US Classification:
361718
Abstract:
An integrated circuit packaging system with an integrated circuit die mounted onto a substrate having a top side ground plane between the integrated circuit and the substrate, a bottom side ground plane and short high frequency connections between the two ground planes. The top side ground plane decreases signal degradation due to reflections by providing high frequency ground access close to the die and by providing a transmission line for bond wires. A grid of conductive vias through the substrate improves thermal conductivity and provides the short high frequency current path for the top side ground plane. The die is separated from the top side ground plane by a dielectric layer which also has a conductive layer next the die to provide a back bias voltage.
Pressure Contact For Connecting A Coaxial Shield To A Microstrip Ground Plane
US Patent:
5308250, May 3, 1994
Filed:
Oct 30, 1992
Appl. No.:
7/968908
Inventors:
Dale D. Walz - Colorado Springs CO
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
G01R 106
US Classification:
439 63
Abstract:
A probe fixture for making multiple high frequency connections to an electronic device under test. An application for the apparatus is in integrated circuit wafer testing fixtures requiring high frequency signals. Low frequency signals are attached by ribbon cables to a printed circuit board. High frequency signals use coaxial cables. A probe carrying ceramic substrate has microstrips for the high frequency signals. Low frequency signals are connected from the printed circuit board to the ceramic substrate by a conductive elastomer interconnect strip clamped between the printed circuit board and the substrate. Coaxial adapters passing through the printed circuit board have spring loaded center conductors to provide pressure contact between the coaxial cables and microstrip signal strips. In one embodiment, contact between coaxial cable shields and microstrip ground is through a conductive clamp to a substrate backplane. In an alternative embodiment, contact between a coaxial cable shield and the microstrip ground is provided by a flat spring connected to a barrel on the coaxial adapter connector body and in pressure contact with coplanar ground contacts on the substrate.
Connector For Strip-Type Transmission Line To Coaxial Cable
US Patent:
5404117, Apr 4, 1995
Filed:
Oct 1, 1993
Appl. No.:
8/131049
Inventors:
Dale D. Walz - Colorado Springs CO
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
H01P 104
US Classification:
333 34
Abstract:
An electronic connector for connecting a coaxial cable to a microstrip transmission line or to a coplanar transmission line. The connector has a transition length which is long enough to be treated as a transmission line rather than as a lumped element. In one embodiment, the transition is linear. In a optimal embodiment for minimal distortion, the transition follows a cosine shape.