Accession Number : ADA313436

Title :   MEMS Integration for a Range of Tire Pressure Devices.

Descriptive Note : Final rept. 22 Jan-22 Aug 96,

Corporate Author : RAINTREE TECHNOLOGY INC ESCONDITO CA

Personal Author(s) : Widner, Ronald D. ; Marshall, James C.

PDF Url : ADA313436

Report Date : 22 AUG 1996

Pagination or Media Count : 115

Abstract : This project investigates the feasibility of an innovative design for a retrofittable tire pressure measuring sensor integrated circuit and packaging. The device when developed and marketed will allow consumers and commercial transportation users to easily and effortlessly determine when to reinflate their tires. The projected savings in energy costs and reduction in air pollutants generated are 2% to 8% per vehicle. With approximately 150 million North American vehicles and an equal number in Japan and Europe, the commercial potential and air quality benefit can be tremendous. The feasibility study investigated passenger car, truck, and aircraft tire applications. The project reported on designs and analytical results obtained in studies of comer compensation for anisotropic etch with KOH, surface micro machined capacitor sensing mechanisms, and charge redistribution CMOS analog processing. The designs investigated a subminiature pressure transducer package which provides a unique interface between sensor and tire. Finite element modeling results of the package and MEMS integrated circuit revealed a robust structural design. Spice simulation of the analog circuit showed acceptable performance. The report also identifies key work to be accomplished in order to complete development. Further development was recommended.

Descriptors :   *INTEGRATED CIRCUITS, *PRESSURE MEASUREMENT, *ELECTROMECHANICAL DEVICES, *TIRES, *RETROFITTING, MATHEMATICAL MODELS, EUROPE, TRANSPORTATION, COMMERCE, AIR POLLUTION, PRESSURE TRANSDUCERS, FINITE ELEMENT ANALYSIS, ENERGY, ETCHING, JAPAN, COSTS, FEASIBILITY STUDIES, ANISOTROPY, SILICON, SUBMINIATURE ELECTRONIC EQUIPMENT, PACKAGING, VEHICLES, AIR QUALITY, PASSENGER VEHICLES, SAVINGS, CONSUMERS, COMPLEMENTARY METAL OXIDE SEMICONDUCTORS, ANALOG SYSTEMS, NORTH AMERICA, CAPACITORS, STRUCTURAL ENGINEERING, AIRCRAFT TIRES.

Subject Categories : Electrical and Electronic Equipment
      Surface Transportation and Equipment
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE