The present invention relates to a golf club head provided with a face and a body. The organic thin film transistor maintains low off-state leakage current and realizes a high onoff current ratio and high charge mobility because the organic active layer thereof is formed of an alternating copolymer of phenylene vinylene and oligoarylene vinylene. A current mirror circuit generates a current having the same value as that of the increase current generated by the increase current generating circuit and supplies the generated current to the drain terminal of the transistor. Said silicone material is particularly useful for impressions, for example dental impressions and for making pads used in pad printing techniques. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers. The top of the capsule is depressed manually forcing a plunger tube connected to the bottom of the capsule to rip away the bottom and side portion dispensing the material.