Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
176 words
A thermistor composition comprising a thermistor characteristic powder consisting of a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO, a bismuth-containing lead borosilicate glass frit, an electrically conductive powder selected from the group consisting of a mixture of silver powder and ruthenium oxide powder and a mixture of gold powder and ruthenium oxide powder, characterized in that a mixing ratio of the thermistor characteristic powder, the glass frit and the electrically conductive powder is in the area of the qualrilateral ABCD in the accompanying triangular diagram of FIG. 1 and the amount of ruthenium oxide powder in the electrically conductive powder is 15-95% by weight of the total weight of the electrically conductive powder, with the vertexes A, B, C and D of the quadrilateral ABCD being the points showing the following compositions: ______________________________________
Thermistor charac-
teristic powder
Electrically conductive
Glass frit
(% by weight)
powder (% by weight)
(% by weight)
______________________________________
A 20 10 70
B 70 10 20
C 30 50 20
D 20 50 30
______________________________________
Claim 2
Dependent Claim
176 words
A thermistor composition comprising a thermistor characteristic powder consisting of a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO, a bismuth-containing lead borosilicate glass frit, an electrically conductive powder selected from the group consisting of a mixture of silver powder and ruthenium oxide powder and a mixture of gold powder and ruthenium oxide powder, characterized in that a mixing ratio of the thermistor characteristic powder, the glass frit and the electrically conductive powder is in the area of the qualrilateral ABCD in the accompanying triangular diagram of FIG. 1 and the amount of ruthenium oxide powder in the electrically conductive powder is 15-95% by weight of the total weight of the electrically conductive powder, with the vertexes A, B, C and D of the quadrilateral ABCD being the points showing the following compositions: ______________________________________
Thermistor charac-
teristic powder
Electrically conductive
Glass frit
(% by weight)
powder (% by weight)
(% by weight)
______________________________________
A 20 10 70
B 70 10 20
C 30 50 20
D 20 50 30
______________________________________
Claim 3
Dependent Claim
36 words
A thermistor composition according to claim 1, wherein the bismuth-containing lead borosilicate glass frit comprises SiO 2 , PbO, B 2 O 3 , BaO, CaO, Bi 2 O 3 and Al 2 O 3 .
Claim 4
Dependent Claim
49 words
A thermistor composition according to claim 2, wherein the glass frit comprises, by weight, 24% of SiO 2 , 23% of PbO, 20% of B 2 O 3 , 15% of BaO, 8% of CaO, 6% of Bi 2 O 3 and 4% of Al 2 O 3 .
Claim 5
Dependent Claim
34 words
A thermistor composition according to claim 3, wherein the thermistor characteristic powder is a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO in a molar ratio of 2:1:3.
Claim 6
Dependent Claim
34 words
A thermistor composition according to claim 3, wherein the thermistor characteristic powder is a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO in a molar ratio of 2:3:1.
Claim 7
Dependent Claim
222 words
A thick film thermistor, characterized in that said thermistor comprises a ceramic substrate, a lower electrode formed on said substrate, a thermistor layer formed on said lower electrode and extending onto said substrate, and an upper electrode formed on said thermistor layer and extending onto the substrate, wherein said thermistor layer comprises a thermistor characteristic powder consisting of a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO, a bismuth-containing lead borosilicate glass frit and an electrically conductive powder selected from the group consisting of a mixture of silver powder and ruthenium oxide powder and a mixture of gold powder and ruthenium oxide powder, with the mixing ratio of the thermistor characteristic powder, the glass frit and the electrically conductive powder in the area of the quadrilateral ABCD in the accompanying triangular diagram of FIG. 1 and the amount of the ruthenium oxide powder in the electrically conductive powder is 15-95% by weight of the total weight of the electrically conductive powder, the vertexes A, B, C and D of the quadrilateral ABCD being the points showing the following compositions: ______________________________________
Thermistor charac-
teristic powder
Electrically conductive
Glass frit
(% by weight)
powder (% by weight)
(% by weight)
______________________________________
A 20 10 70
B 70 10 20
C 30 50 20
D 20 50 30
______________________________________
Claim 8
Dependent Claim
222 words
A thick film thermistor, characterized in that said thermistor comprises a ceramic substrate, a lower electrode formed on said substrate, a thermistor layer formed on said lower electrode and extending onto said substrate, and an upper electrode formed on said thermistor layer and extending onto the substrate, wherein said thermistor layer comprises a thermistor characteristic powder consisting of a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO, a bismuth-containing lead borosilicate glass frit and an electrically conductive powder selected from the group consisting of a mixture of silver powder and ruthenium oxide powder and a mixture of gold powder and ruthenium oxide powder, with the mixing ratio of the thermistor characteristic powder, the glass frit and the electrically conductive powder in the area of the quadrilateral ABCD in the accompanying triangular diagram of FIG. 1 and the amount of the ruthenium oxide powder in the electrically conductive powder is 15-95% by weight of the total weight of the electrically conductive powder, the vertexes A, B, C and D of the quadrilateral ABCD being the points showing the following compositions: ______________________________________
Thermistor charac-
teristic powder
Electrically conductive
Glass frit
(% by weight)
powder (% by weight)
(% by weight)
______________________________________
A 20 10 70
B 70 10 20
C 30 50 20
D 20 50 30
______________________________________
Claim 9
Dependent Claim
37 words
A thick film thermistor according to claim 5, wherein the bismuth-containing lead borosilicate glass frit comprises SiO 2 , PbO, B 2 O 3 , BaO, CaO, Bi 2 O 3 and Al 2 O 3 .
Claim 10
Dependent Claim
50 words
A thick film thermistor according to claim 7, wherein the glass frit comprises, by weight, 24% of SiO 2 , 23% of PbO, 20% of B 2 O 3 , 15% of BaO, 8% of CaO, 6%, of Bi 2 O 3 and 4% of Al 2 O 3 .
Claim 11
Dependent Claim
35 words
A thick film thermistor according to claim 8, wherein the thermistor characteristic powder is a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO in a molar ratio of 2:1:3.
Claim 12
Dependent Claim
35 words
A thick film thermistor according to claim 8, wherein the thermistor characteristic powder is a reaction product obtained by solid phase reaction of MnO 2 , CoO and NiO in a molar ratio of 2:3:1.