Thick Film Guidelines

Available Ceramic Materials

Ceramic Information

Surface Finish: A lapped finish will have a matte look.
- 96% Al2O3
  - Lapped: 18µ-in Nominal
- 99.5% Al2O3
  - Lapped: 10µ-in Nominal
- 99.6% Al2O3
  - Lapped: 10µ-in Nominal
- AlN
  - Lapped: 18µ-in Nominal
- BeO
  - Lapped: 25µ-in Nominal
Standard Sub Sizes and Tolerance:
- Al2O3
  - Length & Width
    - 2” Sq
    - 2.25” Sq
    - 4” Dia
    - 6” Dia
  - Thicknesses
    - 0.010” – 0.050”
- AlN
  - Length & Width
    - 2” Sq
    - 2.25” Sq
    - 3.0” Sq
  - Thicknesses
    - 0.010” – 0.050”
- BeO
  - Length & Width
    - 2.06” Sq
    - 2.3” x 2.9”
    - 3.7” Sq
  - Thicknesses
    - 0.010” – 0.050”
Stellar offers finished parts at custom sizes and thicknesses
- Finished Part Length & Width Tolerance (Dicing)
  - Standard: ±0.002”
  - Special: ±0.001”
- Thickness Tolerance
  - Standard: ±0.001”
  - Special: ±0.0005”
  - As Fired: ±10%

Other Available Options

Available Pastes

Minimum Trace/Space Width & Diameter

Au, Pd/Ag, Ag and Cu
- 0.005” MIN space and trace & 0.008” Dia. MIN
Pt/Au
- 0.006” MIN space and trace & 0.008” Dia. MIN
Dielectric
- 0.010” MIN space and trace & 0.010” Dia. MIN
- Special: Contact us
Solder Mask
- 0.010” space and trace & 0.020” Dia. MIN
- Special: Contact us
Solder Paste
- 0.020” space and trace & 0.020” Dia. MIN
- Special: Contact us

Printed Feature Size Tolerances & Standard Printed Pullback Requirements

Conductors
- ±0.003” on spaces, traces and metal pullbacks from finished part edge
Solder Mask/Dielectric/Solder Paste
- ±0.010” on space and trace
- Special: Contact us
Printed Pullback Requirements
- Single Side Print
  - 0.002” Minimum nominal pullback
- Multi Sided Print
  - 0.003” Minimum nominal pullback
- Away from Pre-Laser and Post Laser Work
  - 0.005” Minimum nominal pullback

Custom criteria, in depth details and Stellar’s inspection criteria available upon request