An image forming apparatus is disclosed. To achieve this object, the switching thin-film transistor is formed as a transistor of LDD structure or offset structure while the current thin-film transistor is formed as a transistor of self-alignment structure. The meter utilizes an all electronic design including a meter microcontroller, a measurement microcontroller, a communication microcontroller and spread spectrum processor, and a plurality of other communication interface modules for communicating commodity utilization and power quality data to a utility. The use of such a catalyst achieves high yields and selectivities.