Title:
CIRCUIT BOARD AND SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP3962347
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a rapture of a resistor film by eliminating the local thermal expansion of a dielectric film caused by heat from a resistor in a circuit board having the resistor film on the dielectric film.
SOLUTION: In the circuit board, a resistor film 6 and a wiring conductor film 7 are provided in direct contact on a BCB film 3 which is the dielectric film of a microstrip line. Then a recess 10 wherein the thickness of the BCB film 3 immediately under the resistor film 6 is made smaller in comparison with others is formed, and the resistor film 6 is formed on the BCB film 3 in the recess 10. Through the thinned portion, the heat of the resistor film 6 is quickly dissipated to a ground conductor film 2.
Inventors:
Hiroyuki Sakai
Yoshito Ikeda
Ota Junmichi
Kaoru Inoue
Nishii Katsunori
Takayuki Yoshida
Yoshito Ikeda
Ota Junmichi
Kaoru Inoue
Nishii Katsunori
Takayuki Yoshida
Application Number:
JP2003090514A
Publication Date:
August 22, 2007
Filing Date:
March 28, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01L23/12; H05K1/16; H05K1/02; H05K1/18; (IPC1-7): H01L23/12; H05K1/02; H05K1/16; H05K1/18
Domestic Patent References:
| JP9219422A | ||||
| JP8153853A | ||||
| JP9260583A | ||||
| JP997818A | ||||
| JP1064953A | ||||
| JP3114252A | ||||
| JP3239357A | ||||
| JP4273196A |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Takashi Goto
Iseki Katsumori
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Takashi Goto
Iseki Katsumori