//MAR 2018 – PRESENT

Assembly and Testing

NuCurrent has complex PCB designs that include 0201, QFN, and BGA component packages.  The rework we do with their PCBs tests our ability to be precise while working as efficiently as possible.  The types of tasks vary widely, so we come into each job with a fresh perspective.  One day, it will be using our knowledge of electrical bench equipment to validate Qi coils.  Another day, it will be using our knowledge of PCB layouts to troubleshoot design. We enjoy working with NuCurrent because they, like us, are not afraid to face the challenges of innovation.  Bring on the next puzzle!  

Client: NuCurrent, Inc.
Skills: PCB Rework, PCB Assembly, PCB Milling, Product Assembly, Product Disassembly, LRQ Qi Coil Testing  

As NuCurrent grows it’s important for us to have a partner like ChipKick. Their precision, timeliness and ability to operate within our bustling lab is a real value to us.

Jim Crnkovic

VP of Engineering, NuCurrent

Above is a microscope shot of a tiny PCB that we reworked.  The pad layout for the chip in the middle did not match the chip’s pinout, so it was up to us to figure out how to make it work without modifying the CAD and ordering new PCBs.  We decided to flip the chip upside down and solder microwire between the correct pads.  In the end, the circuit was functional and the quality was as good as original!

Above is a microscope shot of a chip that we reworked.  The original PCB pad layout for this chip did not match the chip, so we figured out a way to flip it and also solder it to the correct pads using microwire.  In the end, it worked!

Here we disassembled a smartphone.  The goal was to insert a NuCurrent receiver into the phone to demonstrate the wireless charging capabilities to the client.  We would have had to start over with a new phone if our cuts were imprecise or the heat melted the plastic.  We got this procedure done right the first time and NuCurrent was able to continue on with their prototyping.

Above is a microscope shot of a chip that we reworked.  The original PCB pad layout for this chip did not match the chip, so we figured out a way to flip it and also solder it to the correct pads using microwire.  In the end, it worked!

This image shows the end result of a typical assembly and electrical testing job that we perform for NuCurrent.  In this specific job, about half of the components were already placed, so we could not use a stencil to lay down the solder paste.  To stay efficient, we developed a manual solder paste and hot air reflow process.  We were able to get the new components soldered, while maintaining the quality of the existing components and PCB.

Above is a microscope shot of a chip that we reworked.  The original PCB pad layout for this chip did not match the chip, so we figured out a way to flip it and also solder it to the correct pads using microwire.  In the end, it worked!

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