The absence of high temperature electronics is an obstacle to the development of untapped energy resources (deep oil, gas, and geothermal). This paper describes a project under the U.S. Dept. of Energy's Deep Trek program to develop SOI CMOS processes and design platforms targeted to meet this need. Deep Trek is a technology development program to enable drilling systems for the extreme conditions that are encountered in tapping deep natural gas reservoirs. The program is administered by the Strategic Center for Natural Gas (SCNG), which is an organization of the National Energy Technology Laboratory. The objective is to dramatically reduce the cost and risk of drilling to depths of 20,000 feet (6,096 meters) or more. To put this in perspective, more than 70% of current natural gas production is from wells that are less than 5,000 feet (1,524 meters) deep. The Deep Trek program has funded multiple projects and multiple technologies since 1997. Projects have been funded to address tubing materials, cements, drilling fluids, and electronics tools which show the technical application diversity of the Deep Trek program scope. This Deep Trek project is awarded to Honeywell International and is managed from Honeywell's Defense and Space Electronic Systems organization. The goal of this project is to commercialize high temperature building block chips that are specified by the Joint Industrial Participation (JIP) membership (Oil and Gas Service and Operators, Aerospace & Down Hole Instrumentation Companies). The benefit of accomplishing this goal will provide a high temperature process and tool kit infrastructure to enable future down-hole electronics for oil and gas exploration and production electronic tool needs.