CIRCUIT ANALYSIS PREVENTING STRUCTURE FOR COMMUNICATION UNIT

摘要

PURPOSE:To immediately restrict the output operation of a circuit when protection resin on a substrate is peeled off and to prevent the circuit analysis of a communication unit. CONSTITUTION:The communication unit 11 transmits/receives data to and from a communication equipment main body and transfers data without contact. Circuit parts 13 and a circuit pattern 15 using conductive resin for a part are loaded on the substrate in the communication unit 11. The outer periphery is integrally covered and formed by protection resin 16. The circuit analysis preventing structure of the communication unit is provided with a judgement means judging the propriety of the circuit pattern 15 when the circuit of the communication unit 11 operates and a restriction means restricting the output operation of the circuit when the judgement means judges the pattern to be unsuitable.