GAS SENSOR ELEMENT AND MANUFACTURING METHOD OF GAS SENSOR ELEMENT

• Main Authors: KOJIMA AKIYOSHI, FURUTA SAI
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To improve characteristics stability of a gas sensor element.SOLUTION: A gas sensor element includes a gas measuring chamber, an oxygen pump cell, an oxygen concentration detection cell, and lead parts 79a, 79b. The lead part 79a is formed so as to, on an undersurface of an insulation member 76, fold an inner peripheral wall of a through hole 176 from a top face to the undersurface of the insulation member 76. The lead part 79b is formed as to cover the lead part 79a along the inner peripheral wall of the through hole 176 and fold the lead part 79a from the top face to the undersurface of the insulation member 76. The lead part 79a includes a portion exposed to a space 230 on the undersurface of the insulation member 76, and the lead part 79b is separated from an insulation substrate 101 arranged opposite the insulation member 76 with the space 230 interposed therebetween. The lead part 79a is in communication with the outside of the gas sensor element 7 via the space 230.SELECTED DRAWING: Figure 3 【課題】ガスセンサ素子の特性の安定性を向上させる【解決手段】ガスセンサ素子は、ガス測定室と酸素ポンプセルと酸素濃度検出セルとリード部７９ａ，７９ｂとを備える。リード部７９ａは、絶縁部材７６の下面において、スルーホール１７６の内周壁を、絶縁部材７６の下面から上面に巻き込むように形成される。リード部７９ｂは、スルーホール１７６の内周壁に沿ってリード部７９ａを覆うとともに、絶縁部材７６の上面から下面に巻き込むように形成される。リード部７９ａは、絶縁部材７６の下面側において空間２３０に対して露出している部分が存在し、リード部７９ｂは、空間２３０を挟んで絶縁部材７６と対向するように配置された絶縁基板１０１と離間し、リード部７９ａとガスセンサ素子７の外部は空間２３０を介して連通している。【選択図】図３