Direct adhering polysilicon based strain gage
First Claim
1. A semi-conductor strain gage for directly adhering to and for operably connecting with, a system being measured, said strain gage comprising:
- an inert substrate having a first surface portion and a second surface portion, the second surface portion being metallized with a thin layer of metal, the second surface portion providing a surface for soft solder attachment of the strain gage to the system;
a thin polysilicon layer deposited on the first surface portion;
a half bridge strain gage pattern etched from the thin polysilicon layer of the first surface portion of the inert substrate.
1 Assignment
0 Petitions
Accused Products
Abstract
An economical non-metallic strain gage insensitive to ambient temperature variations, and without a diode junction, which is suitable for general use and particularly for use in touch screens, wherein the gage is adapted to be directly adhered to the screen. The gage is metallized with a thin layer of a solderable metal for electrical soldering connection to strain measurement devices and for reliable mechanical support. The gage includes an etched polysilicon material on a substrate base, such as a silicon wafer, wherein the polysilicon is doped with a dopant material such that output measurements are independent of temperature changes.
20 Citations
21 Claims
-
1. A semi-conductor strain gage for directly adhering to and for operably connecting with, a system being measured, said strain gage comprising:
-
an inert substrate having a first surface portion and a second surface portion, the second surface portion being metallized with a thin layer of metal, the second surface portion providing a surface for soft solder attachment of the strain gage to the system; a thin polysilicon layer deposited on the first surface portion; a half bridge strain gage pattern etched from the thin polysilicon layer of the first surface portion of the inert substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A semi-conductor strain gage and system to be measured, comprising:
-
a system to be measured having a metal substrate; a semi-conductor strain gage directly adhered to the system being measured, said strain gage being positioned on the metal substrate of the system to be measured, the strain gage including; an inert substrate having a first surface portion and a second surface portion, the second surface portion being metallized with a thin layer of metal, the second surface portion being soft soldered to the metal substrate of the system to be measured; a thin polysilicon layer deposited on the first surface portion; and a half bridge strain gage pattern etched from the thin polysilicon layer of the first surface portion of the inert substrate. - View Dependent Claims (19, 20, 21)
-
Specification