Inline 3D SPI, Standard Automatic solder paste inspection system As one of the strongest SMT 3D SPI Manufacuturer in China, we provide you all the different models of online solder paste inspection machine,we have variety of size and models of the
Parts & Supplies | Chipshooters / Chip Mounters
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Click here to view the SlimKIC 2000 datasheet Profiling So Easy, Anyone Can Do It By automating the complex task of process set up the SlimKIC® 2000™ makes profiling so easy that any operator can quickly achieve the optimal process. Simply select fro
Click here to view the SlimKIC 2000 datasheet Profiling So Easy, Anyone Can Do It By automating the complex task of process set up the SlimKIC® 2000™ makes profiling so easy that any operator can quickly achieve the optimal process. Simply select fro
Users can now spend under $800.00 USD and receive a feature-filled DMM with 11 measurement and 8 math functions. Other important considerations are its noise immunity, USB with 2000 measurements and transfers/sec 10-channel scan option, temperature m
Technical Library | 2020-08-27 01:22:45.0
Initially adopted internal specifications for acceptance of printed circuit boards (PCBs) used for wire bonding was that there were no nodules or scratches allowed on the wirebond pads when inspected under 20X magnification. The nodules and scratches were not defined by measurable dimensions and were considered to be unacceptable if there was any sign of a visual blemish on wire-bondable features. Analysis of the yield at a PCB manufacturer monitored monthly for over two years indicated that the target yield could not be achieved, and the main reasons for yield loss were due to nodules and scratches on the wirebonding pads. The PCB manufacturer attempted to eliminate nodules and scratches. First, a light-scrubbing step was added after electroless copper plating to remove any co-deposited fine particles that acted as a seed for nodules at the time of copper plating. Then, the electrolytic copper plating tank was emptied, fully cleaned, and filtered to eliminate the possibility of co-deposited particles in the electroplating process. Both actions greatly reduced the density of the nodules but did not fully eliminate them. Even though there was only one nodule on any wire-bonding pad, the board was still considered a reject. To reduce scratches on wirebonding pads, the PCB manufacturer utilized foam trays after routing the boards so that they did not make direct contact with other boards. This action significantly reduced the scratches on wire-bonding pads, even though some isolated scratches still appeared from time to time, which caused the boards to be rejected. Even with these significant improvements, the target yield remained unachievable. Another approach was then taken to consider if wire bonding could be successfully performed over nodules and scratches and if there was a dimensional threshold where wire bonding could be successful. A gold ball bonding process called either stand-off-stitch bonding (SSB) or ball-stitch-on-ball bonding (BSOB) was used to determine the effects of nodules and scratches on wire bonds. The dimension of nodules, including height, and the size of scratches, including width, were measured before wire bonding. Wire bonding was then performed directly on various sizes of nodules and scratches on the bonding pad, and the evaluation of wire bonds was conducted using wire pull tests before and after reliability testing. Based on the results of the wire-bonding evaluation, the internal specification for nodules and scratches for wirebondable PCBs was modified to allow nodules and scratches with a certain height and a width limitation compared to initially adopted internal specifications of no nodules and no scratches. Such an approach resulted in improved yield at the PCB manufacturer.
Industry News | 2018-10-18 08:34:52.0
How to Prevent Solder Bridging in 3528 PLCC6 RGB LEDs?
Industry News | 2011-03-14 17:49:05.0
CyberOptics Corporation will debut its latest inspection systems in Booth #1749 at the upcoming IPC/APEX conference and exhibition, scheduled to take place April 12-14, 2011 at the Mandalay Bay Resort & Convention Center in Las Vegas.
Industry News | 2024-05-20 10:54:58.0
Altus Group has announced the addition of PVA's new PathMaster X software to its product portfolio. PathMaster X transforms programming for PVA's conformal coating and dispensing systems with an intuitive, game-like controller interface.