| 摘要 |
<p>PURPOSE:To improve the efficiency of various works by enabling to described an identifying circuit for various circuits readly by a writing instrument used normally on the surface of an IC package. CONSTITUTION:A pale sheet of suitable area or rough surface plastic sheet is bounded at the prescribed position on the surface of an IC package. Thus, prescribed symbols can be described by a pencil on this portion, thereby largely improving the efficiency of various works such as maintenance or tests.</p> |
