EP 0704864 B1 20021113 - Resistor on a ceramic circuit board
Title (en)
Resistor on a ceramic circuit board
Title (de)
Widerstand auf einer keramischen Platte
Title (fr)
Résistance sur circuit céramique
Publication
Application
Priority
- JP 23336594 A 19940928
- JP 4972395 A 19950309
Abstract (en)
[origin: EP0704864A2] A ceramic circuit board having an external resistor prepared by co-firing a low-bubbling resistor and a glass overcoat in which Ag is used in an amount of 0 to less than 1% by weight with a glass having a deformation temperature not higher than that of the glass of the overcoat in the low-bubbling resistor and a glass of CaO-Al2O3-SiO2-B2O3 system is used in the overcoat. Also, in the low-bubbling resistor, Ag may be contained in an amount of at least 1% by weight in combination with a glass having such a deformation temperature that this deformation temperature minus 10 DEG C is not higher than that of the glass of the overcoat. Addition of Ag to the resistor can render the deformation temperature of the glass of the resistance paste substantially equal to or less than that of the glass of the overcoat, thereby enabling further reduction of the amount of bubbles remaining in the resistor after firing. The low-bubbling resistor not only enables accurate adjustment of the resistivity by laser trimming but also enables stable maintenance of the resistance value after the trimming.
IPC 1-7
IPC 8 full level
H01C 17/02 (2006.01); H01C 17/065 (2006.01); H05K 1/03 (2006.01); H05K 1/18 (2006.01); H05K 3/28 (2006.01)
CPC (source: EP)
H01C 17/02 (2013.01); H01C 17/065 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0704864 A2 19960403; EP 0704864 A3 19961023; EP 0704864 B1 20021113; DE 69528802 D1 20021219; DE 69528802 T2 20030410; JP 3093601 B2 20001003; JP H08153945 A 19960611
DOCDB simple family (application)
EP 95115134 A 19950926; DE 69528802 T 19950926; JP 4972395 A 19950309