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BGA Rework Stencils

Description

If you’ve been using metal stencils for BGA rework, we have some great news for you. Flextac BGA Rework Stencils...a creative new product that is a major improvement over what you maybe using now.

These flexible solder paste stencils are laser cut from high quality, anti-static polymer film with a residue-free adhesive backing. Because they are self-sticking, no tape or fixturing is needed. The adhesive seals around each BGA pad to prevent solder paste from bleeding under the stencil when the paste is applied. Flextac Stencils are easy to use and leave no residue on the board surface.

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 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. Holds the side tabs while placing the Flextac 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 uses 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 squeege as needed to assure proper aperture filling. The Flextac Stencil is then peeled up leaving a perfect deposit of solder on each pad. Although Flextac Stencils are disposable, they can be used several times.

Application
  • 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.
  • Wide selection.
  • Packaged in a handy ESD safe carrying case
Specifications

    Material: Anti-static Polymer Film
    Adhesive: Residue-Free
    (Exceeds BELCORE S.I.R. GR-78-CORE)



Flextac BGA Rework Stencil Kit (click to buy) is packaged in a rugged ESD safe case.


The Kit includes 20 different sizes of BGA rework stencils, a spatula handle and three sizes of spatula blades.


Step 1: Select the proper size and fold up the side tabs.
 
Step 2: Peel off the cover film exposing the adhesive backing
 

Step 3: Place in position using the handy side tabs.
 
Step 4: Apply paste using a standard metal squeegee.
 
 
Step 5: Remove the stencil and save for another reuse or dispose.
 

Note: All part numbers listed below are sold in packages of 10.

0.65mm (.0256") Pitch
Ball
Count
Grid Size &
Ball Pattern
Thickness
(in)
Thickness
(mm)
Hole
Diam.
(in)
Hole
Diam.
(mm)
Component
Body
Description
336 14 x 14, Full Array.004"(0.102 mm).020"(0.508 mm) 14 mm x 14 mm ST-336-9BG020-1
0.80mm (.0315") Pitch
Ball
Count
Grid Size &
Ball Pattern
Thickness
(in)
Thickness
(mm)
Hole
Diam.
(in)
Hole
Diam.
(mm)
Component
Body
Description
280 16 x 16, Full Array .004"(0.102 mm).017" (0.432 mm) 16 mm x 16 mm ST-280-6BG019-4
1.00mm (.039") Pitch
Ball
Count
Grid Size &
Ball Pattern
Thickness
(in)
Thickness
(mm)
Hole
Diam.
(in)
Hole
Diam.
(mm)
Component
Body
Description
64 8 x 8, Full Array .004" (0.102 mm) .020" (0.508 mm) 10 mm x 13 mm ST-064-3BG008-4
19614 x 14, Full Array.004"(0.102 mm).020"(0.508 mm)15 mm x 15 mmST-196-3BG014-4
25616 x 16, Full Array.004"(0.102 mm).020"(0.508 mm)17 mm x 17 mmST-256-3BG016-4
32418 x 18, Full Array.004"(0.102 mm).020"(0.508 mm)19 mm x 19 mmST-324-3BG018-4
32422 x 22, P4-Row, +6 x 6 center.004"(0.102 mm).020"(0.508 mm)23 mm x 23 mmST-324-3BG022-4
48422 x 22, Full Array.004"(0.102 mm).020"(0.508 mm)23 mm x 23 mmST-484-3BG022-4
67226 x 26, Full Array.004"(0.102 mm).020"(0.508 mm)27 mm x 27 mmST-672-3BG026-4
67626 x 26, Full Array.004"(0.102 mm).020"(0.508 mm)27 mm x 27 mmST-676-3BG026-4
1657 41 x 41, Full Array .006" (0.152 mm) .025" (0.635 mm) 42.5 mm x 42.5 mm ST-1657-3BG041-6
1.27mm (.050") Pitch
Ball
Count
Grid Size &
Ball Pattern
Thickness
(in)
Thickness
(mm)
Hole
Diam.
(in)
Hole
Diam.
(mm)
Component
Body
Description
1197 x 17, Full Array.006"(0.152 mm).025"(0.635 mm)14 mm x 22 mmST-119-2BG07X12-6
20817 x 17, P4-Row.006"(0.152 mm).025"(0.635 mm)23 mm x 23 mmST-208-2BG017-4
25616 x 16, Full Array.008"(0.203 mm).032"(0.813 mm)21 mm x 21 mmST-256-2BG016-8
25620 x 20, P4-Row.006"(0.152 mm).025"(0.635 mm)27 mm x 27 mmST-256-2BG020-6
27220 x 20, P4-Row, +4 x 4 center.006"(0.152 mm).025"(0.635 mm)27 mm x 27 mmST-272-2BG020-6
29220 x 20, P4-Row, +6 x 6 center.006"(0.152 mm).025"(0.635 mm)27 mm x 27 mmST-292-2BG020-6
30416 x 19, Full Array.008"(0.203 mm).032"(0.813 mm)21 mm x 25 mmST-304-2BG16X19-8
35226 x 26, P4-Row.006"(0.152 mm).025"(0.635 mm)35 mm x 35 mmST-352-2BG026-6
35719 x 19, Full Array.006"(0.152 mm).025"(0.635 mm)25 mm x 25 mmST-357-2BG019-6
36119 x 19, Full Array.008"(0.203 mm).032"(0.813 mm)25 mm x 25 mmST-361-2BG019-8
38826 x 26, P4-Row, +6 x 6 center.006"(0.152 mm).025"(0.635 mm)35 mm x 35 mmST-388-2BG026-6
42026 x 26, P5-Row.006"(0.152 mm).025"(0.635 mm)35 mm x 35 mmST-420-2BG026-6
43231 x 31, P4-Row.006"(0.152 mm).025"(0.635 mm)40 mm x 40 mmST-432-2BG031-4
56033 x 33, P5-Row.006"(0.152 mm).025"(0.635 mm)42.5 mm x 42.5 mmST-560-2BG033-6
62425 x 25, Full Array.008"(0.203 mm).032"(0.813 mm)32.5 mm x 32.5 mmST-624-2BG025-8
62525 x 25, Full Array.008"(0.203 mm).032"(0.813 mm)32.5 mm x 32.5 mmST-625-2BG025-8
1.50mm (.059") Pitch
Ball
Count
Grid Size &
Ball Pattern
Thickness
(in)
Thickness
(mm)
Hole
Diam.
(in)
Hole
Diam.
(mm)
Component
Body
Description
22515 x 15, Full Array.006"(0.152 mm).025"(0.635 mm)27 mm x 27 mmST-225-1BG015-6


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