Printing material container, and board mounted on printing material container

A method of supplying ink to a printing apparatus, the printing apparatus having a print head and a plurality of apparatus-side electrical contact forming members, the method comprising:

• providing a printing material container adapted to be attached to the printing apparatus by being inserted into the printing apparatus in an insertion direction;
• providing a body of the printing material container comprising an ink supply opening having an exit adapted to supply ink from the printing material container to the printing apparatus:
• providing a circuit board comprising:
• a plurality of container-side terminals having contact portions adapted to contact corresponding apparatus-side electrical contact forming members, the contact portions of the container-aide terminals including a plurality of low voltage contact portions electrically coupled to a low voltage electronic device that is adapted to function with a low voltage, and a first high voltage contact portion and a second high voltage contact portion electrically coupled to a high voltage electronic device that is adapted to function with a high voltage, which is higher than the low voltage, wherein:
• the contact portions are disposed in a first row of contact portions and in a second row of contact portions, the first row of contact portions and the second row of contact portions extending in a row direction which is generally orthogonal to the insertion direction;
• the positions of the contact portions in the first row of contact portions alternate with the positions of the contact portions in the second row of contact portions with respect to the row direction;
• the first row of contact portions is longer than the second row of contact portions with respect to the row direction;
• the first row of contact portions i$ disposed at a location that is further in the insertion direction than the second row of contact portions;
• the first row of contact portions has a first end position and a second end position disposed at opposite ends thereof;
• and
• the first high voltage contact portion is disposed at the first end position of the first row of the contact portions, and the second high voltage contact portion is disposed at the second end position of the first row of contact portions;
• and
• mounting the circuit board on the body of the printing material container at a position and orientation such that, when the printing material container is attached to the printing apparatus, the contact portion of each container-side terminal contacts a corresponding apparatus-side electrical contact forming member so that electrical communication for performing a printing operation of the printing apparatus is enabled between the printing material container and the printing apparatus.