| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a stress resulted from the unevenness of adhesive applied state difficult to be generated, and minimize the generation of noise by fixing a pyroelectric element on a substrate with a conductive adhesive having a pencil hardness after curing of a specified value. SOLUTION: In this pyroelectric infrared ray sensor, a conductive adhesive for bonding a pyroelectric element 2 to a substrate 3 has a pencil hardness after curing of 4B or less. As the conductive adhesive, rubber, silicone, urethane, and polyolefin adhesives, or mixtures of these epoxy resins are used. Thus, even when the adhesive applied state is uneven, no noise output is generated without adding a stress to the pyroelectric element 2. The stress resulted from the difference in thermal expansion coefficient between the pyroelectric element 2 and the substrate 3 by the ambient temperature change can be also moderated by the adhesive of the bonding part.</p> |
