A practical look at FC-325LA pressure-assisted silver sintering paste—its printing window, attachment options and recommended processing conditions for large-area bonding.

Copper paste is widely used for via filling in HDI PCBs, TGV substrates, multilayer circuits and advanced electronic packaging. However, one common manufacturing problem is that a via appears completely filled before curing, but becomes recessed, develops voids or loses volume after curing.

Voids in HDI via filling are commonly caused by trapped air, unsuitable paste rheology, incomplete filling, contamination and uncontrolled curing. Reducing them requires the material, via geometry, filling method and curing profile to be evaluated as one complete process.

JL-CS01-FE conductive copper paste offers fast 160°C curing, high conductivity and bending resistance for PET, PI, sensors and printed circuits.

On the morning of August 25, 2026, Joinspire officially moved into our new office in Longhua District, Shenzhen. The relocation gives our team a more comfortable and efficient working environment while keeping us close to customers, partners and Shenzhen’s electronics industry ecosystem.

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.