Das Bild zeigt eine große Waferbumping-Schablone aus Edelstahl mit typisch kreisförmig angeordneten, lasergeschnittenen Mikrolöchern . Die hohe Aperturanzahl (bis zu 600.000 Öffnungen im 12-Zoll-Format) ermöglicht exakte und gleichmäßige Lotbump-Depots beim Bumping-Prozess . Das charakteristische Kreismuster sorgt für eine homogene Lotverteilung und reproduzierbare Bump-Höhen auf dem Wafer und ist ein Markenzeichen technischer Hochpräzisions-Schablonen 

Wafer bumping stencils

Precision through innovative laser technology

The wafer bumping stencil we have developed has a significant influence on the amount of solder and thus the height of the bumps produced. Our stencils guarantee ideal consistency of the transferred solder paste thanks to particularly tight tolerance limits. With deviations of only ±3 μm in sheet thickness and hole contour, we offer significant advantages over alternative manufacturing processes.

 

Advantages

  • High positioning accuracy
  • Surface roughness < 0.9 μm
  • Apertures in the range of 90 x 110 μm
  • High accuracy of drill diameters
  • Accuracy of aperture size ± 3 μm
  • Cutting gap 20 μm
  • Packing density of up to 250,000 openings
Das Bild zeigt die Oberfläche einer Leiterplatte mit sehr gleichmäßigen, gleichhohen Lotbumps (Halbkugeln), die mittels einer von LaserJob entwickelten Waferbumping-Schablone aufgebracht wurden . Dank den extrem engen Toleranzen von nur ±2 μm bei Blechdicken und ±3 μm bei der Lochkontur werden ideale Konstanz und Wiederholgenauigkeit beim Lotpastentransfer und der Bump-Höhe erreicht . Dies bietet maßgebliche Vorteile gegenüber alternativen Schablonenherstellungsverfahren – insbesondere bei sehr hoher Packungsdichte und kleinsten Aperturen für die professionelle Elektronikfertigung
Macro image of the bumps

The wafer bumping stencil significantly influences the amount of solder and thus the height of the bumps produced. Our stencils guarantee ideal consistency of the transferred solder paste thanks to particularly tight tolerance limits. With deviations of only ±2 μm in sheet thickness and ±3 μm in hole contour, we offer significant advantages over alternative manufacturing processes.
 

Solder paste printing on wafers

Laser-cut stainless steel stencils are used for printing solder paste on wafers, among other applications. Once the solder paste has melted, solder bumps are formed. This process involves printing solder paste or solder balls onto a wafer to produce connection balls. The stencils are characterised by a high number of closely spaced apertures measuring around 90 x 110 μm. A packing density of up to 250,000 openings is not uncommon. These stencils are typically 20–70 μm thick.

Height of the bumps

Due to this high packing density and the small openings, special demands are placed on cutting precision and positioning accuracy. The wafer bumping stencil has a significant influence on the amount of solder and thus the height of the bumps. The wafer bumping stencil manufactured by Laser Job guarantees ideal consistency of the transferred solder paste thanks to particularly tight tolerance limits for sheet thicknesses of ± 3 μm and hole contours of ± 3 μm, giving it clear advantages over other manufacturing processes. The laser cutting process developed by LaserJob guarantees maximum precision and thus meets the high requirements of component manufacturers.

Stencil underside

The underside of the stencil receives special treatment, as even the slightest unevenness can cause damage to the wafer. For this reason, Laser Job treats all wafer stencils with an ultra-fine brush on both the squeegee side and the wafer side. This ensures a surface roughness of < 0.9 μm.

Customized solutions

With our innovative laser cutting technology, we are revolutionizing the field of wafer bumping and offering you customized solutions for demanding semiconductor manufacturing processes. Our high-precision processes not only ensure outstanding accuracy but also increase the process reliability and quality of your manufacturing processes in the long term.

Our other services

Why chose LaserJob?

adept knowledge

Through our customized data preparation solutions and the optimization of your CAD data in collaboration with our specialists, we guarantee maximum efficiency and quality for your project.

direct contact

Your immediate access to us: Personal contact – fast, easy, and reliable.

all from one provider

We combine a wide variety of technologies and processes to achieve the best results: cutting, welding, marking, ablating, coating, etc.

express delivery

6-hour express service ex works:  
Orders received by 1:00 p.m.
shipped on the same working day. 

Your ideas, our expertise

Let's get your project started!

To ensure that your order is processed quickly, 

please send us your order, including the relevant data, by email to mail@laserjob.de

 

Please send us your Gerber files for the templates by email to mail@laserjob.de

We also process your ODB++, DWG, or DXF data.

Transportation is usually carried out by TNT, GO, UPS, DHL, FedEx (all delivery types), as well as by express delivery and courier delivery with partner companies. 

We are happy to ship your stencil with the carrier of your choice using your customer number.

Standard delivery time for wafer bumping stencils

Standard delivery time ex works: 3-5 working days

Orders received by 5 p.m. (=1st working day)

 

LaserJob is a pioneer in laser-cut SMD stencils, with developments ranging from the first standard stencil to the state-of-the-art nano-coated PatchWork® stencil. Get in touch with us and let's discover together how we can best support you. Your reliable partner for SMD stencils for over 30 years.
Online inquiry
Andreas Axmann Vertrieb SchabloneAndreas Axmann Vertrieb SchabloneAndreas Axmann Vertrieb Schablone
Andreas AxmannSales SMD-stencils

Any further questions? We would be happy to advise you!

FAQ: Frequently asked questions

Standard delivery times are 3-5 business days

Our stainless steel materials are supplied with a defined thickness, which exhibits very little variation in material thickness. For material thicknesses below 100µm, the variation is < 2µm.

The underside of the wafer bumping stencil receives special treatment, as even the slightest unevenness can cause damage to the wafer. That is why LaserJob treats all wafer bumping stencils with an ultra-fine brush on both the squeegee side and the wafer side. This ensures a defined surface roughness of <0.9 µm.