Glass spacers | Interposers

Our produced Glass Spacers (Interposers) are suitable for 2.5D / 3D integration and wafer-level bonding with semiconductor substrates for MEMS, sensors, analytical chips, or other functional devices.

We ensure:

  • Ultra-high precision and quality
  • Various types of glasses
  • Small feature sizes
  • High aspect ratios unachievable with alternative technologies

WOP offers high surface quality glass wafers with densely packed through holes that require none or minimum post-processing before being used in your production process. We offer prototyping and production for your individual designs.


  • Custom design
    we will make any design you want
  • Speed
    1 million holes in 15 minutes, takt time
  • Ultra-high precision & quality
  • Various types of glasses
  • Small feature sizes
  • High aspect ratios

Typical features

  • Variety of glasses, major suppliers – Corning, Schott, Hoya, AGC
  • Wafer size – up to 200 mm x 200 mm (8”)
  • Wafer thickness – from 30 µm to 10 mm
  • Round, square and other shapes through holes
  • Straight hole cross-section | no taper
  • ≤10 μm chipping > typ. none
  • Smooth sidewalls, Ra<1 μm
  • Typical min. hole size 20 µm (round)
  • ±3 µm positional accuracy
  • No debris on back and front surface
  • No sagging around holes
  • Aspect ratio up to 1:100
  • High throughput and yield
  • Ability to work with metalized glasses (e.g. Au, Pt, Ni, Cr, Mo)
  • Minimal or no post-processing is needed


  • Sensors
  • Advanced packaging applications
  • Semiconductors
    and other functional devices
  • MEMS
  • Wafer level optics
  • Aerospace applications
Contact us

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Mokslininku st. 6A, Vilnius, LT-08412, Lithuania

Phone: +370 5 215 7551
E-mail: [email protected]

Company details

Altechna R&D, UAB
Company code 301502628
VAT code LT100006155012
Bank – SEB 70440
LT87 7044 0600 0770 8092