Incomplete filling, cracks and unstable electrical resistance can turn a small via into a costly production problem. For manufacturers working on TGV and HDI designs, the goal is clear: fill the vias consistently and keep the connections stable through processing and use.

Jufeng JL-CS-F01 copper via filling paste is a single-component conductive resin material developed for via plugging and filling.

Accurate solder volume is essential when joint dimensions, placement and repeatability matter. This guide explains how to select the right solder preform by alloy, size, shape, flux option and packaging method—and what information to provide when requesting a custom solution.

When engineers, purchasing teams, or SMT manufacturers evaluate lead-free solder paste options, one question comes up again and again:

Why does SAC305 keep showing up as the default recommendation?

If a 0201 component, miniature sensor lead or tiny PCB pad keeps flooding with solder, the problem may not be your hand, your iron or your temperature setting. The solder wire itself may simply be too thick for the joint.

As AI accelerators move beyond the kilowatt threshold, thermal management is becoming one of the most important challenges in advanced semiconductor packaging.

Industry pain points: why do via-fill materials keep failing?
In advanced semiconductor packaging, PCB via-filling, and microelectronic interconnection processes, engineers repeatedly run into the same set of problems:

With the rapid development of flexible electronics including RFID tags, flexible sensors and wearable devices, printing processes based on PET & PI substrates have achieved great progress. However, traditional conductive pastes still have obvious defects in mass production: weak adhesion, cracking after bending, unstable resistance and high comprehensive cost, restricting product upgrading.

As new energy vehicles, 5G communication and high-power electronics continue to grow, sintered silver is becoming an important next-generation die attach material for high-reliability electronic packaging.

As high-precision industries such as RF electronics and electronic communications continue to grow, the requirements for joining materials are becoming increasingly demanding.

Joinspire FC-325LA pressure silver sinter paste is designed for large-area silver sintering in SiC power module packaging, delivering high reliability, process stability and excellent long-term performance.