Spring pad for electrical interconnection of inkjet printing system

The present invention relates generally to inkjet printers, and more particularly to an inkjet printing system including a spring pad which ensures electrical interconnection between electrical contacts of a printer carriage and corresponding electrical contacts of a print cartridge installed in the printer carriage. A spring pad for ensuring electrical interconnection between electrical contacts of a printer carriage and corresponding electrical contacts of a print cartridge installed in the printer carriage includes a base having a first side and a second side opposite the first side, and a plurality of resilient bumps protruding from the first side of the base. Each of the resilient bumps have a substantially semi-ellipsoidal shape and include a hollow interior communicating with the second side of the base.