Silver Pastes for Double Print Applications

You need a partner that helps you with the metallization of solar cells with a double print process. Heraeus silver pastes offer ultra-fine-line screen printing, also for mass production.

SOL9662B Series

New Generation Front Side Double-Print Paste

Double printing has always been one of a synonym for high efficiency cell because of its advantages in finger quality and aspect ratio. Conceptually, Double printing gives them the ability to print very narrow printing finger lines on top of each other, this can be technically challenging for both cell manufacturer and metallization paste supplier.

Heraeus, the technology leader, closely collaborating with customers, has developed SOL9662B double-print front-side silver paste package. The SOL9662B has been formulated based on our unique patent-pending SOL9661B glass chemistry, combined with the upgraded organic vehicle system for DP-UFL. This new double print package has the state-of-art formulation with perfectly balanced metallization contact and passivation damaged. As confirmed by customers, with the new screen design, SOL9662B can further narrow the line width to improve the aspect ratio and to reduce the laydown.

KEY BENEFITS

  • Ultra-low laydown and high adhesion
  • Great printability and superior overlapping
  • A+A’ and A+B double-print packages available
  • Outstanding efficiency gain through improved Ulta-Fine-Line and contact on Perc with SE
  • Improved paste rheology with better finger geometry that can print through (< 18 μm) screen printing

SOL9652B Series

Front-side Double-Print Paste Package

Double-printing for Ultra finger line (DP-ULF) is a technique many c-Si PV cell manufacturers support for improving cell efficiency. Conceptually, double printing

gives them the ability to print very narrow line widths without compromising line quality by printing finger lines on top of each other. This can be technically challenging for both cell manufacturer and metallization paste supplier.

Collaborating with customers, Heraeus Photovoltaic has developed SOL9652B double-print front-side silver paste packages. The SOL9652B package has been formulated

based on our unique patent-pending 9651B glass chemistry, combined with the upgraded organic vehicle system for DP-UFL; This new double print package has the state-of-art paste formulation with perfectly balanced metallization contact and passivation damage.

KEY BENEFITS

  • Outstanding efficiency gain through improved ultra-fine-line (DP-UFL) and contact on PERC
  • Improved paste rheology with better finger geometry that can print through (< 18 μm) screen opening
  • Compatible to different screens design and type (high mesh and Knotless screen);
  • Better 1st layer and 2nd layer pastes compatibility and overlapping
  • Great yield rate in high throughput mass production (> 350 mm/s) without printing defects
  • A+A, A+A’, A+B printing packages available for higher Fill-Factor and Voc
  • Flexible packages to balance paste laydown and efficiency under different test conditions
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