Contractual Test Waiver Liabilities in Cross Border Electronics Assembly
Contractual test waivers transfer financial risk for latent manufacturing defects from the offshore assembler to the buyer upon shipment authorization.
Electrical Test
Continuity Verification
Screening printed circuit boards for uncommitted short circuits and open traces prevents unviable assemblies from entering downstream production lines. An electrical test measures resistance or continuity across specified test points to confirm netlist integrity against original design files. Bare board verification uses flying probe needles or bed-of-nails fixtures to check copper interconnects prior to component placement.
The measurement confirms that electrical paths match schematic connectivity without unintended shorts.
Fixture Application
Automated test equipment contacts exposed copper pads or vias using spring-loaded pogo pins configured to match board geometry. Executing an electrical test on high-density interconnect designs requires precise mechanical alignment to avoid damaging fragile surface finishes or solder mask openings. Flying probe systems eliminate custom fixture tooling for small production runs by moving software-controlled probes across designated coordinates.
Dedicated fixture arrays deliver faster throughput for mass production by checking hundreds of nets in a single press cycle. High voltages applied during dielectric withstand checks detect thin insulation barriers that standard low-voltage continuity measurements miss.
Defect Isolation
Identifying faults early reduces repair costs and prevents catastrophic component failure during powered functional testing. When an electrical test detects an unexpected resistance value between adjacent nets, diagnostic software logs the location for technician review. Unresolved net failures trigger immediate board rejection or designated trace rework.