PVDF (Polyvinylidene Fluoride) is a high-purity, rigid fluoropolymer offering exceptional resistance to aggressive acids, halogens, and nuclear radiation, widely specified for semiconductor chemical manifolds.
Engineering Specifications & Parameters
Density
1.78 g/cm3
Purity Class
Semiconductor Cleanroom Grade (Low Outgassing)
Machinability
80% (Rigid Fluoropolymer)
Tensile Strength
50 MPa (7,250 psi)
Chemical Resistance
Acids, Halogens, Chlorine, UV Radiation
Continuous Operating Temp
-40 C to +150 C (-40 F to +300 F)
High Purity Chemical & Thermal Resistance
PVDF offers mechanical strength and creep resistance superior to PTFE while maintaining continuous operating capabilities up to 150 C (300 F) in aggressive chemical environments.
Cleanroom Machining Guidelines
Tooling: Uncoated micrograin carbide or diamond-coated (PCD) tools reserved exclusively for clean polymers to avoid metal cross-contamination.
Cooling: Deionized (DI) water or clean filtered air blast. Never use mineral-oil cutting fluids for semiconductor wet-bench components.
Stress Annealing: Pre-annealing at 140 C relieves extrusion stresses for tight-tolerance fluidic valve blocks.
Semiconductor Wet Benches & Chemical Pumps
Ultra-pure chemical fluidic manifolds, pump impellers, acid etching nozzles, and DI water valve bodies.
Frequently Asked Questions
Why is PVDF preferred over PTFE for precision semiconductor manifolds?
PVDF has significantly higher tensile strength and stiffness than PTFE, resisting cold flow and creep under high fluid pressures.
How to achieve burr-free threaded ports on PVDF valve blocks?
Use single-point thread mills with high spindle speed rather than conventional taps to prevent thread root tearing.
