| 摘要 |
<p>PURPOSE: To make it possible to use the same circuit board even when the constant of a printed electric part is different due to the difference in specification by a method wherein a plurality of printed electric parts having different constant is formed by printing on a board, and a connection part, to be used for selective change of the connection of the plurality of printed electric parts in accordance with the specification of the electric circuit, is provided. CONSTITUTION: The mounting pattern of an emitter terminal E and a through hole 11 are connected to a board through a connection pattern P11, and the mounting pattern of the emitter terminal E and a through hole 12 are connected through a connection pattern P12. On a printed resistor surface (b), a resistor R11 is formed between the through hole 11 and an earthing pattern GND as a printed resistor, and a resistor R12 is formed between the through hole 12 and the earthing pattern GND as a printed resistor. The resistor R11 and the resistor R12 have different resistance values, and after reflowing treatment has been conducted, either of the connection patterns P11 and P12 can be selected by connecting them by soldering.</p> |
