A principal surface at one side of a support substrate has thereon an adjustment layer made of material having a higher thermal expansion coefficient than that of the support substrate. Various methods of the present invention include providing a point-of-sale device and coupling it to a communication network. The processor updates a history of the associated program to reflect the results of the determination. The stress layer covers devices of the active pixel cell that are on the substrate and the devices include a photodiode next to the STI and a transistor, and the deposition of the stress layer results in the second stress being exerted on the substrate, the second stress countering the first stress.