Patent ID: 7125100

Claim:
An ink cartridge, comprising: a receptacle having an ink chamber for storing ink; and a circuit board having a storage device for storing data relating to ink; and the ink, said circuit board being disposed on the receptacle and comprising; at least two ground terminals, each having a ground contact portion that are located on one axis thereof, said ground contact portions being arranged in a first row having outermost ends; and a plurality of terminals, each having a contact portion, arranged on said circuit board, for read/write operations on said data relating to the ink, said plurality of terminals including a power supply terminal, said contact portion of said power supply terminal being arranged in a second row parallel to said first row; wherein said ground contact portions are not the terminal contact portions in closest proximity to said power supply terminal contact portion and are located at the outermost ends of said first row, and wherein said first row is located further from a center of the circuit board than the second row.