Electronics Assembly Knowledge, Vision & Wisdom HOME PROGRAMS DIRECTORY SUBSCRIBE ARCHIVE/TRANSLATE Ask the Experts << Page 1 of 34 >> Arranged via association with Circuitnet.. See the Expert Panel | Submit A Questions | Join the Panel Programs are sorted by published date, most recent first. Directory Search         Program Search         Long Term Component Storage We need to store a variety of SMD components for at least 10 years. What do you recommend for humidity and temperature settings? Ask the Experts Environment Impact on Assembly, Printing and Reflow Is particle count a good parameter to control? How can having high particle concentrations affect our PCB assembly process or reflow process? Ask the Experts Stencil Pattern for Thermal Pads on QFNs We know why it is important to "mesh" but need more info regarding what is best aperture size, number of apertures, etc. Can you point us to information? Ask the Experts Components Falling Off During Wave Soldering We are facing a problem with components falling off during PCB wave soldering. Could the problem be caused by the lacquer coating on the PCBs? Ask the Experts Dust contamination after selective soldering We are using SN100C alloy and a no-clean flux applied with drop jet. The dross dust appears in the vicinity of solder joints, but not immediately adjacent. Ask the Experts Bottom Terminated Components and Vias Should the thermal vias of bottom terminated components be tented on both sides to prevent flux trapping and solder wicking? Ask the Experts Initial Screen Print Test Board Is it recommended to print one cycle before printing the first production board? I could use a scrap board or blank plastic card for the first print. Ask the Experts Solder Paste Viscosity What key factors affect solder paste viscosity? Assuming we only focus on the powder, will more fine powders increase the paste viscosity or the reverse? Ask the Experts Twisting Multi-strand Wires Should multi-strand wires be twisted before they are tinned with solder? What are the benefits of twisting prior to tinning? Ask the Experts Partially Visible or Hidden Solder Connections Being a CM, it is not feasible to add an X-Ray inspection to the process due to added cost. How do others in the industry handle this? Ask the Experts Ask the Experts << Page 1 of 34 >> About | Advertising | Archives | Contact | Directory | Directory Search | Directory Submit | Privacy | Programs | Program Search | Sponsorship | Subscribe | Terms | Translate Circuit Insight 6 Liberty Square #2040, Boston MA 02109 USA Jeff Ferry, Publisher | Ken Cavallaro, Editor/Business Manager Copyright © Circuitnet Media LLC. All rights reserved. A Circuitnet Media Publication