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Flextac BGA Rework Stencils
Typical BGA rework stencils are made from metal and require fixturing or taping to position them and hold them in place. Metal stencils warp easily, and if the circuit board has undulations in the board surface, the metal stencil will not sit flat. Since there is no gasket-like seal, solder paste can easily bleed under metal stencils when paste is applied with a squeegee. Also solder paste can spill out over the sides of flat metal stencils contaminating the circuit board surface. Metal stencils require tedious stencil cleaning. To use metal stencils effectively, a high level of operator skill is required.
How Flextac BGA Stencils Work
You first fold the pre-scored side tabs and then peel off the protective cover film from the bottom side of the stencil. Hold the side tabs while placing the Flextac BGA Stencil in position on the circuit board surface. If the stencil is not correctly positioned, you can simply reposition it. The side tabs also serve as solder dams preventing solder paste overspill. No external taping or fixturing is used.
You next apply a small dab of solder paste and use a standard squeegee to spread the paste. Since the residue-free adhesive seals around each BGA pad, you can make as many passes with the squeegee as needed to assure proper aperture filling. The Flextac BGA Stencil is then peeled up leaving a perfect deposit of solder on each pad. Although Flextac BGA Stencils are disposable, they can be used several times.
• Applying solder paste for BGA rework.
Features and Benefits
• Residue-free adhesive backing seals around BGA pads to prevent solder paste bleed.
• Laser cut ensures precise aperture size.
• Disposable - eliminates tedious stencil cleaning.
• Flexible - conforms to board surface.
• Fold-up sides for easy placement and solder paste containment.
• Low cost.
US Patent number: 6,253,675
Special Order. Most Flextac BGA Rework Stencils usually ship within 3 business days. How to purchase.
Import duties and Value Added Tax will be collected at time of delivery for all shipments outside the USA.
ELAB (Engineering Lab) FOB Shipping Point: Haverhill, MA 01835 USA
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