Test Tool Delivers Reliable Detection of Latent Defects on High-Density Printed Wiring Boards
January 21, 2019 – Nagano, Japan
The FA1817’s features and capabilities make it ideal for use in inspecting high-density printed wiring boards. With support for a broad range of test types, from low-resistance measurement to high-insulation-resistance measurement, the system reliably detects the latent defects that trouble end-users.
Typical board defects
*1 A printed wiring board (PWB) onto which no electronic components have been mounted
Board probing in action
Printed circuit boards (PCBs) onto which electronic components have been mounted can be found in industrial equipment, automotive devices, consumer electronics, and other products, where they play an extremely important role by providing device operation and control functionality. To ensure their electronic components function properly, bare boards must exhibit high quality and reliability.
In recent years, miniaturization of electronic devices has seen bare boards with finer-pitch, higher-density patterns, as well as large numbers of layers, with the result that latent defects are becoming more common. Recognizing the needs of customers that wish to improve the quality of such bare boards, Hioki developed the FA1817 as a system capable of detecting a variety of phenomena that can cause latent defects, including open vias, near-open defects, micro-shorts, and arc discharges.
· Manufacturers of printed wiring boards
1. Support for a broad range of test types, from low-resistance measurement to high-insulation-resistance measurement
Hioki has taken advantage of its exceptional technological capabilities in the areas of low-resistance measurement and insulation resistance measurement to deliver the ability to measure low resistance as well as high insulation resistance of 100 GΩ/250 V (when using dedicated probes and measurement boards).
The FA1817’s low-resistance measurement functionality measures minuscule fluctuations in resistance values to detect open-via defects. By means of its high-insulation-resistance measurement capabilities, the system also detects insulation abnormalities and arc discharge phenomena caused by the effects of pattern shape anomalies and impurities, voids, and other defects that exist between patterns.
2. Half the impact depth
Traditionally, probes are placed in contact with the board to carry out bare board testing in a process that leaves impact marks on the board. On high-density bare boards, even small marks can have a serious effect. Impact marks from the probes of previous products were already slight, but the FA1817 uses the High-density Probe CP1072, which was developed using proprietary Hioki technology, in order to further reduce the size and depth of these marks. Impact mark depth has been halved compared to that of previous products to minimize damage to bare boards.
3. Optimized probe movement for testing that’s up to 20% faster
By taking advantage of two top arms and two bottom arms to probe target boards efficiently, the FA1817 reduces testing times by up to 20%.
4. Defect analysis with the newly developed Process Analyzer (a standard accessory)