Force sensing ink, method of making same and improved force sens

Details Force sensing ink, method of making same and improved force sens Force sensing ink, method of making same and improved force sens

1994-12-09

1996-07-30

Walberg, Teresa J.

Electrical resistors

Resistance value responsive to a condition

Force-actuated

338 36, 252513, H01C 1010

Patent

active

055415709

ABSTRACT:
An improved carbon-free force sensitive ink for a force sensor. The ink when deposited and dried can function at temperatures of up to 350.degree. F. and pressures of up to 10,000 psi. The preferred ink includes a thermoplastic polyimide binder, conductive particles, intrinsically semi-conductive particles, and dielectric particles, all of an average particle size of 1.0 micron or less. The preferred semi-conductive particles are molybdenum disulfide, ferric and ferrous oxide particles. The preferred conductive particles are conductive metal oxide compounds that deviate from stoichiometry based on an oxygen value of two, such as conductive tin oxide, Fe.sub.3 O.sub.4 iron oxide, and mixtures of them. The preferred dielectric particles are silica. The binder is present in an amount of 20 to 80% by volume. The sensor and a method of making the sensor are also disclosed.

REFERENCES:
patent: 3806471 (1974-04-01), Mitchell
patent: 3859478 (1975-01-01), Cragg et al.
patent: 3926916 (1975-12-01), Mastrangelo
patent: 4120828 (1977-08-01), Michalchik
patent: 4145317 (1979-03-01), Sado et al.
patent: 4152304 (1979-05-01), Tadewald
patent: 4315238 (1982-02-01), Eventoff
patent: 4401590 (1983-08-01), Yoshimura et al.
patent: 4489302 (1984-12-01), Eventoff
patent: 4734034 (1988-03-01), Maness et al.
patent: 4763534 (1988-08-01), Hager
patent: 4856993 (1989-08-01), Maness et al.
patent: 5033291 (1991-07-01), Podoloff, et al.
patent: 5296837 (1994-03-01), Yaniger
patent: 5302936 (1994-04-01), Yaniger
patent: 5473938 (1995-12-01), Handfield et al.

Affiliated with

Also associated with

Rating

Force sensing ink, method of making same and improved force sens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Force sensing ink, method of making same and improved force sens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Force sensing ink, method of making same and improved force sens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1662535