Development of the hybrid structure for the barrel module of the ATLAS silicon-microstrip tracker

Author

Kohriki, Takashi ; Ikegami, Yoichi ; Akimoto, Takashi ; Hara, Kazuhiko ; Iwata, Y. ; Kato, Yoichi ; Kondo, Takahiko ; Nakano, I. ; Ohsugi, T. ; Shimma, Shuichi ; Takashima, R. ; Tanaka, R. ; Terada, Susumu ; Ujiie, Norihiko ; Unno, Yoshinobu

Author_Institution

IPNS, High Energy Accelerator Organ., Ibaraki, Japan

Volume

49

Issue

6

fYear

2002

fDate

12/1/2002 12:00:00 AM

Firstpage

3278

Lastpage

3283

Abstract

A novel hybrid structure for the barrel module of the ATLAS semiconductor tracker (SCT) is developed. The hybrid carries 12 bare readout chips totaling 1536 channels. A flexible copper-polyimide four-layer lamination is used as a basic circuit. The circuit is reinforced by two carbon-carbon bridges coated with Parylene polymer. The hybrid staffed by resistors, capacitors, and pitch-adaptors undergoes heat cycling and quality inspections. The hybrid after chip mounting and wire bonding is placed over the top and bottom sides of the module assembly with no direct contact to silicon sensors. The electrical, mechanical, as well as thermal performances of the module are proven to be excellent.

Keywords

bridge circuits; capacitors; carbon; copper compounds; laminations; nuclear electronics; position sensitive particle detectors; readout electronics; resistors; silicon radiation detectors; ATLAS semiconductor tracker; ATLAS silicon-microstrip tracker; C; Parylene polymer; SCT; Si; bare readout chips; barrel module; capacitors; carbon-carbon bridges; chip mounting; flexible copper-polyimide four-layer lamination; heat cycling; hybrid structure; module assembly; pitch-adaptors; quality inspections; resistors; thermal performances; wire bonding; Assembly; Bonding; Bridge circuits; Capacitors; Flexible printed circuits; Inspection; Lamination; Polymer films; Resistors; Wire;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2002.805527

Filename

1134316