Simple patents can be the strongest. The UK Patent Office has decided that a seemingly simple arrangement of the contacts beneath the main microchip in a cellphone is both new and inventive.
The patent (GB 2377080) issued to British cellphone maker Sendo covers chips that handle both large power-supply currents and high-frequency radio signals. Connections between circuit boards and chips in a phone must be as short as possible, to reduce signal interference 鈥� crosstalk 鈥� with other components. Sendo has discovered that instead of having a chip with contacts all around its edges, it is better to place them underneath the chip in concentric rectangular 鈥渞ings鈥� that alternately carry power and high frequencies. This minimises 鈥減arasitic capacitance鈥�, says Sendo, and keeps power supply and radio signals separate.
