ZESTRON VD en

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When cleaning PCB assemblies, the primary goal is to remove contaminants from populated boards and hybrid circuits resulting from fluxes and improper handling. The use of engineered PCB cleaning solutions is essential to ensure flux residues are fully removed from the assemblies used in high-reliability applications and industries such as automotive, medical, aerospace, and military.

The targeted use of a cleaning agent substantially improves the integrity of subsequent processes such as bonding and conformal coating. Residues can cause improper adhesion of bonds that can lead to failures such as heel cracks or lift-offs. During the coating process, remaining residues can result in poor wetting and delamination that can cause assembly failures and ultimately lead to field failures.

These reliability risks are increased when using lead-free solder pastes as they contain more resins as well as aggressive activator systems and are soldered at higher temperatures.

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ZESTRON VD is solvent-based cleaning agent designed to remove flux residues from electronic assemblies, ceramic hybrids, power modules and leadframes in closed-loop, one chamber, vapor degreasing type systems.

Advantages compared to other surfactant cleaners:

Due to its polar and nonpolar components, it is suitable for a wide range of applications
Completely distillable and therefore suitable for one chamber vapor degreaser processes with vacuum distillation and vapor rinsing
Halogen and surfactant-free
Dries residue-free
Ideal for use in water-free applications, especially when water rinsing is restricted
Ideal for cleaning capillary spaces, such as underneath BGA’s and flipchips
Applicable for stencil cleaning and underside wipe processes in SMT printers

Area of Specific Application

PCBs, ceramic hybrids, power modules & leadframes

Process

Closed loop processes with vapor rinsing
Spray-in-air (explosion-proofed)
Ultrasonic

Contamination

Flux residues
SMT or conductive adhesives
Thick film pastes

Technology

Solvent-based

Zestro VD Technical Data Sheet