Computer system module assembly

Details Computer system module assembly Computer system module assembly

1992-08-26

1994-02-15

Tolin, Gerald P.

Communications, electrical: acoustic wave systems and devices

Borehole testing

257720, 361761, H05K 720

Patent

active

052872475

ABSTRACT:
A computer system module includes a central processing unit (CPU), a floating-point accelerator (FPA), a read/write buffer (RWB), cache memory, a clock generator, buffers, and reset logic. The signal composition of the module includes: Configuration Buffer Enable (CfgEn); Page Write (PgWrt); Block Match (BlkMtch); Byte Write Mask (WrMsk); and Test Enable (TestEn). The layout of the various components on a printed circuit board (PCB) minimizes transmission line effects, such as transmission line delay (t.sub.D) and signal reflections, by keeping trace lengths as short as possible, and no line terminations are required. A heat sink (heat spreader) is provided for critical semiconductor devices, such as the CPU and the FPA. The heat sink includes a broad flat section and a button protruding from a surface thereof. An unpackaged device is mounted to the button, with a thermally and electrically conductive adhesive, and is inserted through a hole in the PCB. The broad flat section of the heat sink is mounted to one side of the PCB, and connections to the die are made with bond wires to a conductive layer on the other side of the PCB. The heat sink is advantageously employed for biasing the semiconductor device.

REFERENCES:
patent: 3909581 (1975-09-01), Stone et al.
patent: 4151580 (1979-04-01), Struger et al.
patent: 4276594 (1981-06-01), Morley
patent: 4293924 (1981-10-01), Struger et al.
patent: 4413319 (1983-11-01), Schultz et al.
patent: 4509096 (1985-04-01), Baldwin et al.
patent: 4510551 (1985-04-01), Brainard, II
patent: 4535385 (1985-08-01), August et al.
patent: 4628407 (1986-12-01), August et al.
patent: 4630172 (1986-12-01), Stenerson et al.
patent: 4731693 (1988-03-01), Berg et al.
patent: 4773955 (1988-09-01), Mabuchi et al.
patent: 4860165 (1989-08-01), Cassinelli
patent: 4872091 (1989-10-01), Maniwa et al.
patent: 4882702 (1989-11-01), Struger et al.
patent: 4942550 (1990-07-01), Murray
patent: 4982311 (1991-01-01), Dehaine et al.
patent: 4994902 (1991-02-01), Okahashi et al.
patent: 5003463 (1991-03-01), Coyle et al.
patent: 5012386 (1991-04-01), McShane et al.
patent: 5038308 (1991-08-01), Le et al.
patent: 5038317 (1991-08-01), Callan et al.
patent: 5038320 (1991-08-01), Heath et al.
patent: 5045998 (1991-09-01), Begun et al.
patent: 5056060 (1991-10-01), Fitch et al.
patent: 5062041 (1991-10-01), Zak
patent: 5065314 (1991-11-01), Maskovyak
patent: 5109513 (1992-04-01), Otsuka
patent: 5127095 (1992-06-01), Kadono
patent: 5133071 (1992-07-01), Sato et al.
patent: 5138702 (1992-08-01), Tada
patent: 5155839 (1992-10-01), Weppler
patent: 5155840 (1992-10-01), Niijima

Affiliated with

Also associated with

Rating

Computer system module assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer system module assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer system module assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1211916