Randall K Frank

Title: Innovations by Randall K Frank

Introduction

Randall K Frank is a notable inventor based in Scottsdale, AZ (US). He has made significant contributions to the field of power semiconductor devices, holding a total of 3 patents. His work focuses on creating efficient and compact solutions for various electronic applications.

Latest Patents

One of his latest patents is a method of forming a modular power device assembly. This invention provides very compact, low-cost power semiconductor device modules suitable for use in variable speed motor controllers and multiple solenoid drivers. The design involves attaching pre-packaged semiconductor devices by their heat dissipation surfaces to opposed planar faces of a metal heat conduction plate using an electrically insulating and thermally conductive epoxy. By carefully choosing the heat conduction plate thickness and the device-to-device spacing, the leads of the pre-packaged devices can be arranged to match the common lead-to-lead and row-to-row spacing of JEDEC DILIC packages, allowing the modules to fit on a conventional package footprint when mounted on a circuit board.

Another significant patent by Frank is for a single package, multiple, electrically isolated power semiconductor. This innovation allows for the encapsulation of dual, triple, quad, and other power semiconductor devices without the use of ceramic or other isolators between the semiconductor die and the die support. For instance, isolated dual power transistors, each having three leads, are encapsulated within the same package outline and lead footprint as a seven-lead TO-218 or TO-220. This is achieved by dividing the die flag into two spaced-apart portions, connecting the leads appropriately, and supporting the spaced-apart die flags and leads with a molded encapsulation.

Career Highlights

Randall K Frank has had a distinguished career at Motorola Corporation, where he has contributed to various innovative projects. His expertise in power semiconductor technology has positioned him as a key figure in the development of advanced electronic components.

Collaborations

Frank has collaborated with several professionals in his field, including his coworker Jerry M DuBois. Their combined efforts have led to the advancement of technology in power semiconductor devices.

Conclusion

Randall K Frank's contributions to the field of power semiconductors demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving electronic device efficiency and functionality.