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 choose 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.

Your ideas, our expertise

Let's get your project started!

To ensure that your order is processed quickly, please send it to us with your data by email to mail@laserjob.de

We process your data in the following formats: Gerber, ODB++, DWG, DXF, Eagle and IGES/step.

Shipping and packaging – Secure, flexible, and environmentally conscious

To ensure that your products arrive safely and in perfect condition, we rely on flexible shipping solutions and well-designed packaging concepts.

Shipping – Fast and tailored to your needs

  • Daily shipping: We ship your orders daily with DHL Express.
  • Custom shipping options: Upon request, we may also use UPS, FedEx, DPD, or other shipping providers of your choice.
  • Diverse transportation options: In addition to traditional parcel services, we offer direct deliveries and courier services with experienced partner companies. This allows us to respond flexibly to your requirements and delivery dates.

Packaging – Safe and sustainable

  • Eco-friendly packaging: All LaserJob parts are shipped in environmentally friendly cardboard boxes or reusable packaging. This conserves resources and protects the environment.
  • Safely packed: To prevent damage, all products are carefully wrapped in appropriate packaging – we are also happy to follow your individual specifications.
  • Special solutions for stencils: We offer special storage bags for our stencils in the tensioning system, which ensure optimum protection and convenient handling.
  • Customer-specific returnable packaging: Would you like to use your own packaging solutions? No problem! We will gladly assist you in developing and integrating your own returnable packaging into our shipping process.

Put your trust in our experience and flexibility – for shipping that provides optimum protection of your products and focuses on your requirements.

Standard delivery time for wafer bumping stencils

Standard delivery time ex works: 3-5 working days

Orders received by 5 pm

 

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.