# US 8,539,844 B2 · Apparatus and methods for measuring a material property > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,844 B2 - Document ID: US8539844B2 - Status: Granted - Kind: B2 - Application number: 13/116,139 - Filed: 2011-05-26 - Published: 2012-11-29 - Granted: 2013-09-24 - Earliest claimed: 2011-05-26 - Assignees: Southern Taiwan University - Applicants: Cheng-Hsin Chuang; Yi-Rong Liou - Inventors: Cheng-Hsin Chuang; Yi-Rong Liou - Web page: https://patentgrep.com/patent/US8539844B2 ## CPC - G01N 3/42: by performing impressions under a steady load by indentors, e.g. sphere, pyramid (G01N3/54 takes precedence) - G01L 1/16: using properties of piezoelectric devices - G01N 2203/0075: Strain-stress relations or elastic constants - G01N 2203/0085: Compressibility - Y10T 29/49002: Electrical device making - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention provides a method for producing a measurement apparatus for measuring a material property. The method includes steps of (a) providing a pressure sensing component having a first and a second surfaces; (b) disposing a first and a second electrodes on the first surface; and (c) disposing an elastic member having a first and a second portions on the first surface, wherein the first and the second portions of the elastic material have different values of an elastic coefficient, and cover the first and the second electrodes, respectively. ## Claims ### Claim 1 A method for producing a measurement apparatus, comprising steps of: providing a pressure sensing component having a first and a second surfaces; disposing a first and a second electrodes on the first surface; and disposing an elastic member having a first and a second portions on the first surface, wherein the first and the second portions of the elastic material have different values of an elastic coefficient, and cover the first and the second electrodes, respectively. ### Claim 2 (depends on 1) A method as claimed in claim 1, wherein the first and the second electrodes are firstly disposed on a flexible substrate, and then disposed on the first surface through the flexible substrate. ### Claim 3 (depends on 1) A method as claimed in claim 1, further comprise a step of: disposing a third and a fourth electrodes on the second surface, wherein the third and the fourth electrodes are firstly disposed on a flexible substrate, and then disposed on the second surface through the flexible substrate. ### Claim 4 (depends on 1) A method as claimed in claim 1, wherein the first portion is disposed on the first surface before the second portion is disposed on the first surface. ### Claim 5 (depends on 1) A method as claimed in claim 1, wherein the second portion is disposed on the first surface via a molding process. ### Claim 6 (depends on 1) A method as claimed in claim 1, wherein the elastic coefficient of the elastic member includes one selected from a group consisting of a Young's modulus, a Rockwell hardness, a Brinell hardness and a Shore hardness. ### Claim 7 (depends on 1) A method as claimed in claim 1, wherein the first portion of the elastic member is harder than the second portion thereof. ### Claim 8 (depends on 1) A method as claimed in claim 1, wherein the first portion of the elastic material is softer than the second portion thereof. ### Claim 9 A measurement apparatus, comprising: a pressure sensing component having a first and a second surfaces; a first and a second electrodes disposed on the first surface; and an elastic member having a first and a second portions, and disposed on the first surface, wherein the first and the second portions of the elastic material have different values of an elastic coefficient, and cover the first and the second electrodes respectively. ### Claim 10 (depends on 9) A measurement apparatus as claimed in claim 9, further comprising a flexible substrate, and the first and the second electrodes are separately and electrically coupled to the flexible substrate. ### Claim 11 (depends on 9) A measurement apparatus as claimed in claim 9, further comprising a third and a fourth electrodes disposed on the second surface, and separately and electrically coupled to a flexible substrate. ### Claim 12 (depends on 9) A measurement apparatus as claimed in claim 9, wherein the elastic coefficient of the elastic member includes one selected from a group consisting of a Young's modulus, a Rockwell hardness, a Brinell hardness and a Shore hardness. ### Claim 13 (depends on 9) A measurement apparatus as claimed in claim 9, wherein the first portion of the elastic material is harder than the second portion thereof. ### Claim 14 (depends on 9) A measurement apparatus as claimed in claim 9, wherein the first portion of the elastic material is softer than the second portion thereof. ### Claim 15 A method of measuring a material property of a matter, comprising steps of: providing a measurement material having a first surface and a second surface opposite to the first surface, wherein the second surface includes a first and a second portions having different measurements of a mechanical property; contacting the first surface with the matter; measuring a first and a second stresses due to the contact, corresponding to the first and the second portions, respectively; and estimating the material property based on the first and the second stresses. ### Claim 16 (depends on 15) A method as claimed in claim 15, wherein the material property is a physical property related to one of an elasticity and a hardness. ### Claim 17 (depends on 15) A method as claimed in claim 15, wherein the material property of the matter is estimated according to a ratio of the first to the second stresses. ### Claim 18 (depends on 15) A method as claimed in claim 15, wherein the mechanical property includes one selected from a group consisting of a Young's modulus, a Rockwell hardness, a Brinell hardness, and a Shore hardness. ### Claim 19 (depends on 15) A method as claimed in claim 15, wherein the first portion of the measurement material is harder than the second portion thereof. ### Claim 20 (depends on 15) A method as claimed in claim 15, wherein the first portion of the measurement material is softer than the second portion thereof.