ALPHA WS619
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- 0.008-Inch Fine-Pitch Printing
- Over Four Hours Stencil Life
- Completely Water-Soluble Flux
Product Description
ALPHA WS-619 Solder Paste is a completely water-soluble, halide-free solder paste for stencil-applied surface-mount assembly where aqueous post-reflow cleaning is required. It supports standard and fine-pitch printing through apertures as small as 0.008 in (0.2 mm) and produces repeatable deposits on 0.016 in (0.4 mm) pitch pads. The paste is offered with 63Sn/37Pb, 62Sn/36Pb/2Ag, and SAC305 alloys in Type 3 or Type 4 powder. Its ORH0 flux carries 0% halide by titration. Typical process data include more than four hours of stencil life at 50% RH and 72 deg F and tack force above 1.5 g/mm2 at six hours. Unopened refrigerated paste has a nominal three-month shelf life between 0 and 10 deg C.
Key features
- Fine-pitch print capability: Supports stencil apertures down to 0.008 in under the documented process.
- Sustained stencil performance: Stencil life exceeds four hours at 50% RH and 72 deg F.
- Completely water-soluble residues: The flux system is designed for aqueous cleaning after reflow.
Applications
Standard and fine-pitch stencil printing for SMT assemblies that use aqueous post-reflow cleaning.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Alloy options | 63Sn/37Pb; 62Sn/36Pb/2Ag; SAC305 | Available configurations | |
| Powder sizes | Type 3; Type 4 | Available configurations | |
| Packaging | 500 g jars; 6 in and 12 in cartridges; 10 cc and 30 cc syringes | Available formats | |
| Flux designation | ORH0 | IPC J-STD-004 | |
| Halide content | 0 | % | By titration |
| Tack force | > 1.5 | g/mm2 | At 6 hours; J-STD-005 |
| Stencil life | > 4 | hours | 50% RH, 72 deg F |
| Shelf life | 3 | months | Refrigerated at 0-10 deg C |
