Difference between revisions of "Contact Aligner (SUSS MA-6)"

From UCSB Nanofab Wiki
Jump to navigation Jump to search
m (→‎About: minor rearrangement)
Line 1: Line 1:
|type = Lithography
|type = Lithography
|super= Lee Sawyer
|super= Lee Sawyer
|super2= Don Freeborn
|phone=(805) 893-2123
|phone=(805) 893-2123
|location=Bay 7
|location=Bay 7

Revision as of 09:05, 30 August 2022

Contact Aligner (SUSS MA-6)
Location Bay 7
Tool Type Lithography
Manufacturer Karl Suss America
Description Mask Aligner/Bond Aligner (MA/BA-6)

Primary Supervisor Lee Sawyer
(805) 893-2123

Secondary Supervisor

Don Freeborn

Recipes N/A

SignupMonkey: Sign up for this tool


This system is a dual-use mask aligner and wafer-bond aligner. Mask alignment is used for contact and proximity exposure processes. Exposures can be performed with gaps programmable from 10 um to 300 um in 1 um increments. Automatic wedge error compensation (WEC) is used to ensure that the mask and wafer are parallel. The lamp is a 350 W Hg-Arc lamp, providing significant power in the g-h-and i-line regime. Integrated light level sensing ensures proper exposure doses as the lamp degrades.

Lithography can be performed on wafers from 2” to 6” in diameter. Piece parts are better handled on the MJB-3 aligners.

The system is fitted with visible, bottom-side optics for back-side alignment capability. Backside alignment is performed with an automated image capture system, at 5x, 10x, or 20x magnification.

Bonding alignment can be performed on 3” to 6” wafers. The bond alignment is performed with special fixturing to allow aligned samples to be transferred to the Karl-Suss SB6 system - contact the supervisor beforehand so the bond alignment fixturing can be installed.

Detailed Specifications

  • 350 W Hg arc lamp, broadband exposure with Suss UV400 Optics (350 - 450 nm)
  • Resolution (per Manufacturer*):
    • * Resolution achieved on 150 mm Si-wafer with 1.2 µm thick AZ 4110
    • Vacuum Contact: <0.8 µm
    • Hard Contact: <1.5 µm
    • Soft Contact: <2.5 µm
    • Proximity (@ 20 µm): <3.0µm
  • Topside alignment accuracy: down to 0.5 µm
  • Backside alignment accuracy: down to 1 µm
  • Automatic Light Intensity Drift Compensation:
    • Channel 1 is calibrated to 9 mW/cm² at 365 nm
    • Channel 2 is calibrated to 15 mW/cm² at 405 nm
  • Programmable "proximity exposure" gaps of 10-300 um in 1 um steps
  • Stored video imaging for overlay alignment
  • Visible Back-Side Alignment System
  • Lithography for 1” to 6” diameter wafers - 6 mm maximum thickness
  • Pieces down to 5 x 5 mm - Please be aware of the stage movement range: X ± 10mm, Y ± 5 mm
  • Chuck Sizes:
    • 1" square (or wafer) and smaller, backside alignment capability
    • 3" wafer, no backside alignment
    • 4" wafer, backside alignment capability
    • 6" wafer, backside alignment capability
  • Mask Holder Sizes:
    • 3"
    • 4"
    • 5" mask - can be modified to support a 6" mask but exposure area will still be ~4" diameter (see Staff)
    • 7"
  • Bond alignment for 4” to 6” wafers, integrates with SB6 bonder
  • Other wafer sizes can be discussed with staff



  • Recipes > Lithography > Suss MA6
    • Also lists the exposure powers.