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US 6,038,132 AGranted
Memory module
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMuneharu Tokunaga, Takakazu Fukumoto
Life of this patent
Estimating the term…
Abstract
A memory module capable of changing the generation of semiconductor memory devices by changing the design of a unit board without changing the design of a mother board. The mother board has connection terminals having an ability of connecting with first and second generation type unit boards, so that even when a connection terminal location is changed as a result of the generation change of the semiconductor memory devices, the next unit board can be connected to the mother board by selecting an appropriate terminal from connection terminals on the mother board.
Claims14
A memory module comprising:
- a mother board for mounting at least two kinds of unit boards thereon, said at least two kinds of unit boards including, a first unit board having a plurality of first generation semiconductor memory devices provided thereon and connection terminals for connection with said mother board, and a second unit board having a plurality of second generation semiconductor memory devices provided thereon and connection terminals for connection with said mother board, said mother board including,
- a first array of mother board connection terminals for connecting with connection terminals of one first unit board, said first array of mother board connection terminals defined by two vertical rows of first mother board connection terminals, and
- a second array of mother board connection terminals for connecting with connection terminals of one second unit board, said second array of mother board connection terminals defined by two vertical rows of second mother board connection terminals, said first and second arrays of mother board connection terminals arranged on a surface of said mother board such that at least one vertical row of first mother board connection terminals is between two vertical rows of second mother board connection terminals;
- and
- at least one first or second unit board mounted to said mother board.
2 more elements
A memory module comprising:
- a mother board including,
- a first array of mother board connection terminals defined by two vertical rows of first mother board connection terminals capable of connecting to corresponding first semiconductor connection terminals of a first semiconductor device;
- a second array of mother board connection terminals defined by two vertical rows of second mother board connection terminals capable of connecting to corresponding second semiconductor connection terminals of a second semiconductor device, said second semiconductor device having a memory capacity greater than a memory capacity of said first semiconductor device, said first and second arrays of mother board connection terminals arranged on a surface of said mother board such that at least one vertical row of first mother board connection terminals is between two vertical rows of second mother board connection terminals;
- and
- at least one first or second semiconductor device mounted to said mother board.
2 more elements
A memory module comprising:
- a mother board for mounting at least two kinds of unit boards thereon, said at least two kinds of unit boards including, a first unit board having a plurality of first generation semiconductor memory devices provided thereon and connection terminals for connection with said mother board, and a second unit board having a plurality of second generation semiconductor memory devices provided thereon and connection terminals for connection with said mother board, said mother board including,
- a first array of mother board connection terminals for connecting with connection terminals of one first unit boards, said first array of mother board connection terminals being defined by first mother board connection terminals arranged in a rectangular configuration which includes a pair of spaced first rows and a pair of spaced second rows being directed substantially perpendicular to said first rows, and
- a second array of mother board connection terminals for connecting with connection terminals of one second unit boards, said second array of mother board connection terminals being defined by second mother board connection terminals arranged in a rectangular configuration which includes a pair of spaced first rows and a pair of spaced second rows being directed substantially perpendicular to said first rows, said first and second arrays of mother board connection terminals arranged on a surface of said mother board such that at least one of said first row of first mother board connection terminals is between two of said first rows of second mother board connection terminal;
- and
- at least one first or second unit board mounted to said mother board.
2 more elements
Dependencies are inferred from the claim text.