Circuit Board Humidity Testing

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• How to build a board bender
  the fixture is spec'd to operate only in conditions typical of indoor laboratories, or about 25C and less than 12% humidity. As of this writing the fixture has been assembled successfully with no unexpected interferences and holds tolerance on deflection during circuit-board tests. A FEW LESSONS LEARNED...
• Conformal Coating Planar Electroluminescent Displays - AN122
  such as humidity, conductive particles, and other airborne foreign matter that might compromise a display's operation by affecting the circuit board. ./333beccd-0112-47ab-ba60-83e63b0ecb36 Conformal Coating. Planar Electroluminescent Displays. Application Note 122-01. This Application Note describes...
• Guidelines for Surface-Mount Power Modules Using Column Pins with Solder Balls (.pdf)
  This application note is intended to provide the user with the best information to date regarding the PCB (printed-circuit-board) mounting and assembly process of TEPS surface-mountable power modules that use Column Pins with Solder Balls. H:\My Documents\SMT\AN_CPSB_v01_final.prn.pdf...
• Making Lithium-ion Batteries Meet MIL-STD-810 (.pdf)
  ,. As presented in Graphic B, the main components. typical discharge rate of approximately 30 percent per month. of a typical Li-ion battery pack includes; 1) the cells, 2). when in storage, and a rigid form factor. NiMH Cells operate. the Printed Circuit Board Assembly (PCA) providing the. effectively between...
• Screw Terminal Connectors
  connectors come in the form of male and female halves. The male half is soldered to the circuit board and female part serves as a socket. Wires are terminated into the female. This modular configuration permits several wires to be connected or removed with one operation. Two-part connectors...
• AN0001 Polymer Termination
  Due to its brittle nature, multilayer ceramic capacitors are more prone to excesses of mechanical stress than other components used in surface mounting. One of the most common causes of capacitor failures is directly attributable to bending of the printed circuit board (PCB) after solder attachment...
• Designing an FCC Approved ASK rfPICTM Transmitter
  . The capacitance can vary widely. frequency. Phase noise or jitter can make spurs wide. with circuit board material, temperature, humidity and. enough to fail spurious limits in adjacent and restricted. manufacturing processes. A good approximation for. frequencies. 0.031 inch or 0.79 mm thick FR4...
• Electric cooktops with a twist
  and easy cleaning, as no awkward controls get in the way. The mTwist magnetic system also resists moisture. The mTwist control is basically a two-circuit-board design. On the sensor board, which is the base for the south-side part of the magnetic system, are the capacitive sensors, processor, LEDs...
• Sleek designs hinge on strong rotary joints
  more options for flexible printed-circuit-board pathway design and protection. Flip-and-twist hinge design adds a bit more whimsy to standard clam shell cell phones. The concept is currently being investigated for camcorders, digital cameras, PDAs, and notebook computers. The quest for quality...
• MICRO:Archives of 1997 Back Issues
  The reader's have spoken again with this year's top-drawing items from our Product Technology News section. The 1997 winners range from CMP cluster tools to cleanroom clogs, MEMS MFCs to molecular analyzers, lithography filters to liquid-level sensors Cutini heads OnTrak; Kern joins YieldUP board; Miller...

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