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US 6,205,027 B1Granted
Structure and method for mounting a circuit module
AssigneeKabushiki Kaisha Toshiba
InventorYuji Nakajima
Life of this patent
Estimating the term…
Abstract
A circuit module mounting structure is described as well as a method for mounting a multi-chip CPU module to a slim and light-weight hand-held computer. To strengthen a grounding connection of the multi-chip in the CPU module, a wiring board includes a first printed grounding pattern which is coupled to a second printed grounding pattern. In the CPU module, fasteners commonly fix both the first and the second grounding patterns through a plurality of bosses.
Claims19
A circuit module mounting structure, comprising:
- a circuit module including a wiring board provided with a wiring pattern, a plurality of IC chips mounted on the wiring board, and a housing case for containing the wiring board, wherein said plurality of IC chips are connected to the wiring pattern, said wiring board has a plurality of first holes through the wiring pattern, and said housing case has a plurality of second through holes corresponding to the first through holes;
- a base circuit board for mounting the circuit module in a predetermined mounting area on the base circuit board which has a plurality of third through holes corresponding to the first through holes in the wiring board, wherein each of the plurality of third through holes is surrounded by a land portion provided on the base circuit board for securing a connection to the wiring pattern within the predetermined mounting area;
- a holder for supporting the circuit module at the predetermined mounting area on the base circuit board, wherein said holder includes a plurality of attached bosses for coupling together the plurality of first through holes in the wiring board and the plurality of second through holes in the housing case, respectively;
- and
- fasteners for commonly fixing the plurality of attached bosses through the plurality of first through holes in the wiring board and also for fixing the plurality of attached bosses through the plurality of second through holes in the housing case.
2 more elements
A hand-held computer having a CPU module mounting structure, comprising:
- a CPU module including a wiring board provided with a wiring pattern, a plurality of IC chips mounted on the wiring board, and a housing case for containing the wiring board, wherein said plurality of IC chips are connected to the wiring pattern, said wiring board has a plurality of first holes through the wiring pattern, and said housing case has a plurality of second through holes corresponding to the first through holes;
- a base circuit board for mounting the CPU module in a predetermined mounting area on the base circuit board which has a plurality of third through holes corresponding to the first through holes in the wiring board, wherein each of the plurality of third through holes is surrounded by a land portion provided on the base circuit board for securing a connection to the wiring pattern within the predetermined mounting area;
- a holder for supporting the CPU module at the predetermined mounting area on the base circuit board, wherein said holder includes a plurality of attached bosses for coupling together the plurality of first through holes in the wiring board and the plurality of second through holes in the housing case, respectively;
- and
- fasteners for commonly fixing the plurality of attached bosses with the plurality of first through holes in the wiring board and also for fixing the plurality of attached bosses with the plurality of second through holes in the housing case.
2 more elements
A method for mounting a circuit module stricture, comprising the steps of:
- providing a circuit module comprised of a wiring board provided with a wiring pattern, a plurality of IC chips mounted on the wiring board, and a housing case for containing the wiring board, wherein said plurality of IC chips are connected to the wiring pattern, said wiring board has a plurality of first holes through the wiring pattern, and said housing case has a plurality of second through holes corresponding to the first through holes;
- mounting said circuit module on a base circuit board at a predetermined mounting area on the base circuit board which has a plurality of third through holes corresponding to the first through holes of the wiring board, wherein each of the plurality of third through holes is surrounded by a land portion provided on the base circuit board for securing a connection to the wiring pattern within the predetermined mounting area;
- supporting the circuit module at the predetermined mounting area on the base circuit board by using a holder which is comprised of a supporting frame and a plurality of bosses attached to the frame for coupling together the plurality of first through holes in the wiring board and the plurality of second through holes in the housing case, respectively;
- and
- fixing the plurality of attached bosses to the housing case through the plurality of first through holes in the wiring board and also for fixing the plurality of attached bases through the plurality of second through holes in the housing case.
2 more elements
Dependencies are inferred from the claim text.