Engineering insight
Use the following as an early selection reference. Specific models, datasheets and samples should be confirmed with actual structure drawings.
01
Five key parameters of F-D curves
A standard dome force-deflection curve shows a typical "peak-valley" shape defined by five characteristic parameters: FP (force peak), RP (rebound force), BD (bounce distance/travel), CL (click life ratio) and F1/F2 ratio. These five parameters together determine tactile quality and service life.
02
Curve selection for different applications
Tactile requirements vary significantly by application. Consumer products pursue light crisp feel, industrial equipment needs clear reliable feedback signals, medical devices focus on consistency over absolute force values, and automotive electronics must consider false-trigger protection under vibration. Prioritize matching FP-RP combination characteristics when selecting.
03
Test methods and equipment
DOME F-D curves are measured using a push-pull gauge with displacement sensor at sampling frequency ≥100Hz. Test conditions should simulate actual assembly including PCB stiffness, aperture size and bonding method. Batch consistency monitoring recommends SPC control charts for FP and RP Cpk values, target Cpk ≥1.33.