Wow, look at all of that flux residue (solder paste)!Ĭontaminant is not only to be judged on cosmetic or functional attributes, but as a warning that something in the cleaning system is not working properly. Paper Downoloaded from the SMART Group website Visual Assessment of No-Clean Paper Downoloaded from the SMART Group website Appearance of Solder Joints Bright & Shiny or Dull & Matte?Īppearance of Solder Joints Just How Many Times Can I Wash An Assembly? The Law of Unintended Consequences: Use of Pearl Pink Erasers
Paper Downoloaded from the SMART Group website The Law of Unintended Consequences: PWB Packaging Minimize handling – finger salts and oils ĭon’t use hand creams and lotions containing silicones įrom the environment or improper assembly practice Paper Downoloaded from the SMART Group website 610 Sections 3.3.X - Handling Ĭleanliness of the work area and work surfacesįood, drink, tobacco – bad in the workplace Note 2: If magnification is used, it is limited to 4X maximum Note 1: Visual inspection may require the use of magnification, e.g. when fine pitch or high density assemblies are present, magnification may be needed to determine if contamination affects form, fit or function. How Close Do You Look? Table 1‐3 Magnification Aid Applications – OtherĬleanliness (with or without cleaning processes) Paper Downoloaded from the SMART Group website Is This Clean? If you look close enough at ANY printed wiring board, you WILL find something wrong, or something that looks like it might be wrong Paper Downoloaded from the SMART Group website IPC-A-610 Visual Cleanliness Process Qualification / Materials Compatibility
Systematic Cleanliness / Cleanliness Verification Paper Downoloaded from the SMART Group website The Goal of Today’s Presentation/Discussion: Educate – Entertain - Engage! Cleaning and Cleanliness In IPC Specifications Doug Pauls and Dave Hillman Principal Materials and Process Engineers Rockwell Collins