Patent ID: 6038132
Filing Date: 2000-03-14
Classification: H01L,H05K

Abstract:
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, anda 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; andat least one first or second unit board mounted to said mother board.