Memory card and sd card

Abstract

According to one embodiment, there are provided a memory which is provided on a circuit board, a controller which is provided on the circuit board and controls the memory, and a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory, in which a width of the signal line in the place where the signal line is led out from the memory is large compared with a place disposed under the memory.

What is claimed is: 
     
         1 . A memory card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory; and   a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory,   wherein a width of the signal line in the place where the signal line is led out from the memory is large compared with a place disposed under the memory.   
     
     
         2 . The memory card according to  claim 1 ,
 wherein the memory is provided with a memory package on which a memory chip is mounted, and   wherein a width of the signal line in a place of a boundary portion of the memory package is large by  2  or more times compared with the place disposed under the memory.   
     
     
         3 . The memory card according to  claim 1 ,
 wherein a width of the signal line in a place where the signal line is led out from the controller is large by 2 or more times compared with the place disposed under the controller.   
     
     
         4 . The memory card according to  claim 1 ,
 wherein the controller includes   a controller chip which is COB-mounted on the circuit board, and   a sealing resin which seals the controller chip on the circuit board, and   wherein a width of the signal line in a place of a boundary portion of the sealing resin is large by 2 or more times compared with the place disposed under the memory.   
     
     
         5 . The memory card according to  claim 1 , further comprising
 a case which is bent and accommodates the circuit board,   wherein a width of the signal line in a bent portion of the circuit board is large by  2  or more times compared with an unbent portion of the circuit board.   
     
     
         6 . A memory card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory;   a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory; and   a land electrode which is provided on an end portion of the signal line and electrically connects the memory to the signal line,   wherein the signal line includes   a first sub-line which is led out from the land electrode, and   a second sub-line which is connected to the land electrode through the first sub-line, and   wherein a width of the first sub-line is large compared with that of the second sub-line.   
     
     
         7 . A memory card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory;   a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory; and   a power line which is disposed on the circuit board along with the signal line so as to be adjacent to the signal line.   
     
     
         8 . The memory card according to  claim 7 ,
 wherein the power line includes   a first power line which is disposed on the circuit board along with the signal line,   a second power line which is disposed on the rear surface of the circuit board so as to intersect the signal line, and   a through hole line which connects the first power line and the second power line.   
     
     
         9 . The memory card according to  claim 8 , further comprising
 a ground pattern which is disposed on the rear surface of the circuit board so as to overlap the first power line.   
     
     
         10 . The memory card according to  claim 9 ,
 wherein the first power line is connected through a fuse.   
     
     
         11 . An SD card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory; and   a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory,   wherein a width of the signal line in a place where the signal line is led out from the memory is large compared with a place disposed under the memory.   
     
     
         12 . The SD card according to  claim 11 ,
 wherein the memory includes a memory package on which a memory chip is mounted, and   wherein a width of the signal line in a place of a boundary portion of the memory package is large by  2  or more times compared with the place disposed under the memory.   
     
     
         13 . The SD card according to  claim 11 ,
 wherein a width of the signal line in a place where the signal line is led out from the controller is large by 2 or more times compared with the place disposed under the controller.   
     
     
         14 . The SD card according to  claim 11 ,
 wherein the controller includes   a controller chip which is COB-mounted on the circuit board, and   a sealing resin which seals the controller chip on the circuit board, and   wherein a width of the signal line in a place of a boundary portion of the sealing resin is large by 2 or more times compared with the place disposed under the memory.   
     
     
         15 . The SD card according to  claim 11 , further comprising
 a case which is bent and accommodates the circuit board,   wherein a width of the signal line in a bent portion of the circuit board is large by  2  or more times compared with an unbent portion of the circuit board.   
     
     
         16 . An SD card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory;   a signal line which is formed in the circuit board and configured to perform data transmission between the controller and the memory; and   a land electrode which is provided on an end portion of the signal line and electrically connects the memory to the signal line,   wherein the signal line includes   a first sub-line which is led out from the land electrode, and   a second sub-line which is connected to the land electrode through the first sub-line, and   wherein a width of the first sub-line is large compared with that of the second sub-line.   
     
     
         17 . An SD card comprising:
 a circuit board;   a memory which is provided on the circuit board;   a controller which is provided on the circuit board and controls the memory;   a signal line which is formed on the circuit board and configured to perform data transmission between the controller and the memory; and   a power line which is disposed on the circuit board along with the signal line so as to be adjacent to the signal line.   
     
     
         18 . The SD card according to  claim 17 ,
 wherein the power line includes   a first power line which is disposed on the circuit board along with the signal line,   a second power line which is disposed on the rear surface of the circuit board so as to intersect the signal line, and   a through hole line which connects the first power line and the second power line.   
     
     
         19 . The SD card according to  claim 18 , further comprising
 a ground pattern which is disposed on the rear surface of the circuit board so as to overlap the first power line.   
     
     
         20 . The SD card according to  claim 19 , wherein the first power line is connected through a fuse.