Definition

Test coupons are sample structures on PCB panels used to verify manufacturing quality without destructive testing of product boards. Impedance coupons contain transmission line structures measured by TDR to verify controlled impedance. Microsection coupons are cross-sectioned to check plating thickness, hole quality, and registration. Solderability coupons verify surface finish. Fabricators include standard coupon patterns on panels; complex designs may require custom coupons. Coupon data provides evidence of process control for quality documentation.