X-ray Inspection of Area Array Solder Joints An area array package has its joints under the body, so the only practical way to look at them without destroying the assembly is with X-ray. The image shows a lot and it does not show everything. What the Image Shows A two…

PCB Solder Paste Improvement: Getting Better Each Lot Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB solder paste improvement gives you a practical advantage when…

PCB Solder Paste Timing: How Long It Takes Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB solder paste timing from the perspective of a PCBA factory floor,…

PCB Solder Paste Handover: Passing It On Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB solder paste handover from the perspective of a PCBA factory floor, covering…

PCB Solder Paste Environment: Where It Happens Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB solder paste environment gives you a practical advantage when you…

PCB Solder Paste Specification: Writing It Down Precisely Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB solder paste specification from the perspective of a PCBA factory floor,…

Wire Harness To Board Connector Interface Design Where a wire harness meets a board, the electrical connection is only half of the problem. The harness is a mechanical object with mass, stiffness, and a routing path, and every movement of the product, every thermal cycle, and every pull on the…

Projector Mainboard Design for Compact Projection Products A compact projector fits a display engine, a battery and a processor into a space the size of a book. Projector mainboard design is dominated by the light source, because the led driver and its power loop set the size, the heat and…

Low Temperature Solder Alloys Compared With SAC305 A lead free assembly is normally soldered with an alloy of tin, silver, and copper that melts at about two hundred and seventeen degrees Celsius, which forces a peak reflow temperature above two hundred and forty. That temperature is close to the limit…

Reflow Defect Troubleshooting in a Structured Sequence Troubleshooting a reflow defect is easy when the cause is obvious and slow when it is not. A structured sequence keeps the investigation from moving to the least likely cause first, which is usually where time is lost. Start With the Defect Class…