FIELD: quality inspection. SUBSTANCE: test coupon is manufactured in the form of multilayer structure including internal and external layers with conductors laying and lands 2, 3. Metallized holes 1 are coupled to lands 2 and 3 over part of hole perimeter and to lands 4 and 5 - over entire perimeter. Section of junction land 4(5) - hole 1 has rounding radius r=(0.1-0.25)l, where l is thickness of multilayer structure. Description gives expression to determine number of holes. EFFECT: enhanced productivity and authenticity of inspection. 2 dwg
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