| 摘要 |
PURPOSE:To render ICs identifiable in terms of their types even after assembly by a method wherein two or more master slice integrated circuits are provided with resistance elements presenting values proper to the respective integrated circuits and one end of a resistance element is connected to the substrate potential and the other to a pad. CONSTITUTION:Integrated circuits (ICs) A-D are master slice ICs different from each other. Resistance elements 1a-1d are resistors presenting different resistance values. A end of a resistor is connected to a pad and the other to the substrate potential. For example, the resistor 1a is set to present 1kOMEGA, 1b 2kOMEGA, 1c 3kOMEGA, and 1d 4kOMEGA. When a resistance value of 1kOMEGA is obtained from one of the resistors after assembling the ICs A-D, the integrated circuit including the resistor is identified as the IC A. In this way, an IC may be named out of a multiple types of master slice ICs by knowing the value a resistor presents. |
