Q: How many times can a StikNPeel™ stencil be used to rework a location?
A: StikNPeel ™ stencils are designed for single use.
Q: What thicknesses are available for the StikNPeel ™ stencil?
A: The StikNPeel ™ stencils are available for 4 (0.10mm), 5 (0.13mm) and 6mil (0.15mm) thicknesses.
Q: Is the residue left by the StikNPeel ™ stencil harmful or negative from a reliability standpoint?
A: BEST’s StikNPeel(TM) rework stencils leave no harmful residues in place on the PCB after it has been taken off of the PCB.
The testing was performed by an outside laboratory with the following as background information:
- Blanks and controls were tested on the Dionex ICS 3000 ion chromatography system before the test began. NOTE: NIST-traceable standards for all system calibrations were used.
- A 1.5mL sample of each test samples’ extracted solution was analyzed using a 1.7mM sodium bicarbonate/1.8mM sodium carbonate eluent.
- All testing was performed on a Dionex ICS 3000 ion chromatography system using Chromeleon software.
In blind testing Group "A" represented the StikNPeel(TM) samples. These samples were prepared using the StikNPeel(TM) stencil and a no clean SAC 305 solder paste alloy. The complete report can be found here.
Q: What files can BEST accept to design my customized StikNPeel ™ stencil?
A: Present the BEST staff with the mechanical datasheet of the part, GERBER drawing including the paste layer section of the site you would like to rework or a dxf or dwg file and after order entry we will let you review the stencil design prior to fabrication.
Q: How small/large can the area of my StikNPeel ™ be?
A: The smallest area would be 2 x 2mm (75 mils) and the maximum area is 2.5(63.5mm) x 2.5.
Q: What are the practical limits of this rework stenciling technique for leaded devices?
A: StikNPeel ™ stencils can be manufactured and have been tested for use for leaded devices down to 0.50mm pitch, 0.25mm aperture with 0.25mm spacing between apertures. Below these guidelines we suggest using a metal rework stencil or StencilQuik ™
Q: What are the practical limits of this rework stenciling technique for BGAs?
A: StikNPeel™ stencils can be manufactured and have been tested for use for leaded devices down to 0.50mm pitch, 0.36mm aperture with 0.14mm spacing between apertures. Below these guidelines we suggest using a metal rework stencil or StencilQuik ™
Q: What is the shelf life of StikNPeel ™ preforms?
A: If stored in optimal conditions (see datasheet) the adhesive system of the StikNPeel ™ stencil has a shelf life of 2 years.
Q: What is the smallest aperture opening that can be made?
A: There is no practcial limit on the aperture opening but the webbing limit (ie the distance between 2 successive openings) is limited to 0.4mm (15mils). While smaller webbing distance can be machined using a squeegee to roll the paste in to the aperture openings becomes the limit.