Title:
プリント配線板及び液位センサ
Document Type and Number:
Japanese Patent JP6629507
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a printed wiring board including at least a pair of electrodes, in which when the occupancy of a liquid to an electrode area is a predetermined value, an electrostatic capacitance between the electrodes is constant and to provide a liquid level sensor including the printed wiring board.SOLUTION: A printed wiring board 1 includes a base material, a wiring pattern 4 which is formed on the base material, and a coverlay which covers the wiring pattern 4. The wiring pattern 4 includes at least a pair of electrodes 4a which detect the electrostatic capacitance between the electrodes. Each of the base material and the coverlay includes at least one of a liquid crystal polymer layer and a fluororesin layer.
Inventors:
Kimura Michihiro
Yoshifumi Uchida
Yamaguchi Kajin
Shogo Asai
Takayuki Tsumaga
Yuki Saito
Keisuke Kawade
Yoshifumi Uchida
Yamaguchi Kajin
Shogo Asai
Takayuki Tsumaga
Yuki Saito
Keisuke Kawade
Application Number:
JP2015014655A
Publication Date:
January 15, 2020
Filing Date:
January 28, 2015
Export Citation:
Assignee:
Sumitomo Electric Print Circuit Co., Ltd.
Sumitomo Riko Co., Ltd.
Sumitomo Riko Co., Ltd.
International Classes:
G01F23/00; G01F23/26
Domestic Patent References:
| JP2005147780A | ||||
| JP2007303982A | ||||
| JP8097565A | ||||
| JP2012216698A | ||||
| JP2010066088A | ||||
| JP2005331508A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Koji Fukui
Tetsuya Hamana
Hironobu Onda
Koji Fukui
Tetsuya Hamana