PCB Assembly

Laminate Shelf Life Control: 6 Rules for Storing Cores

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Laminate Shelf Life Control: 6 Rules for Storing Cores Laminate shelf life is written on the datasheet and then quietly ignored until a lamination problem appears. Resin systems continue to change after manufacture: prepreg advances in cure, cores absorb moisture and both are affected by how they are stored. Panels…

Spray Bar Maintenance: 6 Checks for Even Coverage

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Spray Bar Maintenance: 6 Checks for Even Coverage Spray bar maintenance decides whether a wet process line treats the whole panel the same way. Spray bars look simple: a manifold with nozzles aimed at the work. In practice, each nozzle has its own flow rate, pattern and blockage history, and…

Etch Line Dryer Control: 5 Checks for Spot-Free Panels

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Etch Line Dryer Control: 5 Checks for Spot-Free Panels The etch line dryer is the last thing a panel touches before inspection, and it determines whether the surface leaves the line dry and clean or carrying residue into the next process. Drying does not remove contamination; it fixes it in…

Plating Tank Liner Inspection: 5 Signs of Liner Failure

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Plating Tank Liner Inspection: 5 Signs of Liner Failure Plating tank liner inspection is the kind of maintenance that only becomes urgent when it has already failed. A liner that blisters, cracks or separates at a weld does not announce itself; it drips slowly into the containment area, corrodes the…

SMT Paste Cartridge Handling: Thaw, Purge and Dispensing

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

SMT Paste Cartridge Handling: Thaw, Purge and Dispensing A paste cartridge feeds a dispenser or a jetting head instead of a stencil, and the cartridge becomes part of the machine rather than a container that is opened at the bench. That changes how the paste has to be stored, thawed…

Plating Heat Exchanger Control: Temperature Stability in the Tank

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Plating Heat Exchanger Control: Temperature Stability in the Tank A plating heat exchanger keeps a plating tank at the temperature its chemistry needs, and it does so while the tank is being loaded with work, filtered and dosed. It is an unnoticed part of the process until the deposit starts…

Voids Under a QFN Thermal Pad: Causes and Limits

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Voids Under a QFN Thermal Pad: Causes and Limits A quad flat no-lead package conducts most of its heat into the board through the exposed pad on its underside, and that pad is soldered to a matching copper area on the board. The joint is large, thin and covered by…

Drill Collet Maintenance: Grip, Tool Change and Hole Quality

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Drill Collet Maintenance: Grip, Tool Change and Hole Quality A collet is the holder that grips the drill shank, and it is the last mechanical link between the machine spindle and the cutting edge. Its condition decides whether the tool runs true, whether it is held at the right depth…

Spray Etching Uniformity Across a PCB Panel

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Spray Etching Uniformity Across a PCB Panel Spray etching removes copper by impinging a fine mist of etchant onto the surface, and the uniformity of that removal is the specification that matters on a fine line panel. Two panels can leave the etcher with the same average line width and…

Plating Rack Contact: The Hidden Variable in Copper Thickness

By Frank guo
2026年 9月 14日
PCB Assembly
No Comments

Plating Rack Contact: The Hidden Variable in Copper Thickness In an electroplating line the rectifier sets a voltage and the panel receives a current. What the panel actually receives depends on the path between them, and that path runs through the rack, the contacts, the panel edge and the copper…

Laminate Shelf Life Control: 6 Rules for Storing Cores

Spray Bar Maintenance: 6 Checks for Even Coverage

Etch Line Dryer Control: 5 Checks for Spot-Free Panels

Plating Tank Liner Inspection: 5 Signs of Liner Failure

SMT Paste Cartridge Handling: Thaw, Purge and Dispensing

Plating Heat Exchanger Control: Temperature Stability in the Tank

Voids Under a QFN Thermal Pad: Causes and Limits

Drill Collet Maintenance: Grip, Tool Change and Hole Quality

Spray Etching Uniformity Across a PCB Panel

Plating Rack Contact: The Hidden Variable in Copper Thickness

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