STRAIN GAGES IMBEDDED IN PC BOARD
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2002-Apr-09
Electronic circuit board strain due to bending determination. Strain gages are comprised of thin in manufacturing and handling contributes directly copper foil tracing a serpentine path along a pri- to surface mount solder joint failure and the result- mary axis as shown in Figure 1. They work on the ant reduction in quality. Strain gages are an impor- principal of increasing resistance ofthe copper traces tant measurement tool for printed circuit board deflec- as they are stretched or strained. The resistance tion and surface mount component reliability change is measured and calibrated in units ofstrain.