Exploring the uses of Tg170 FR-4 + Polyimide in PCB design

The newly shipped 4-layer rigid-flex PCB is an advanced and high-quality product that has been specifically designed to meet the needs of modern electronics. The PCB is made from Tg170 FR-4 and Polyimide materials, which are renowned for their durability and strength. The use of a lead-free process ensures that the PCB is environmentally safe, making it an ideal choice for companies that prioritize sustainability.

One of the key features of the newly shipped PCB is its ability to operate within a wide temperature range of -40℃ to +85℃, making it suitable for a variety of applications. This makes it an excellent choice for companies that require a reliable and durable PCB that can withstand harsh environmental conditions.

The stackup of the PCB has been carefully constructed to ensure optimal performance. The board has a finished copper layer of 35um, FR-4 Tg170 dielectric, and prepreg. It features a polyimide core that is adhesiveless, and the board has a finished thickness of 1.5mm rigid part and 0.25mm flexible part. The finished copper weight is 1 oz (1.4 mils) across all layers, and the via plating thickness is 1 mil. The surface finish is ENIG (Electroless Nickel and Immersion Gold), with a top silkscreen in white and a bottom silkscreen also in white. The top solder mask is in matt black, with the bottom solder mask also in matt black. The solder pads have no silkscreen.

The newly shipped PCB has a comprehensive construction, with 66 components and a total of 152 pads. The board features 18 thru-hole pads, 64 top SMT pads, and 70 bottom SMT pads, along with 87 vias and 26 nets. The board dimensions measure 121mm x 126 mm with a tolerance of +/- 0.15mm. The minimum trace/space is 7/8 mils, and the minimum hole size is 0.2mm. There are no blind or buried vias, and slotted holes are defined as per Gerber.

Rigorous testing has been conducted on the newly shipped PCB to ensure optimal performance. It has been 100% electrically tested and has 0.2mm filled vias capped as per IPC-4761 Type VII. A panelized solder paste stencil is supplied for the top side, with three fiducial marks on tooling strips.

The newly shipped PCB is an ideal choice for companies that require a reliable and durable PCB for their applications. Its ability to operate within a wide temperature range makes it an excellent choice for companies that require a PCB that can withstand harsh environmental conditions. The use of top-quality materials and advanced construction techniques ensures that the PCB will perform optimally and provide long-lasting durability.

In conclusion, the newly shipped 4-layer rigid-flex PCB is an excellent example of a high-quality PCB that has been designed specifically to meet the needs of modern electronics. Its construction, comprehensive design, and ability to operate within a wide temperature range make it an ideal choice for companies that require reliable and durable PCBs. With the use of top-quality materials and advanced construction techniques, the PCB is sure to perform optimally and provide long-lasting durability, making it an excellent investment for any company in need of high-quality PCBs. If there are any technical questions, Sally Mao can be contacted at s.mao@bichengpcb.com.