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IGI provided medium area masks (MAMs) in standard sizes of 9″ to 24″, as well as many custom sizes. MAMs were produced on standard substrates of quartz and soda lime, custom substrates, or even customer-supplied substrates. Standard coatings included chrome, aluminum, and iron oxide.

Automated optical inspection (AOI) was used with data and specifications to provide the highest quality and quick turnaround. Die-to-database AOI assured quality for MAMs, regardless of the dimensions. Automated inspections to design rule and die-to-die were also available.

Custom sizes, substrates and coatings were available. Tighter tolerances and defect specifications were also available for specials. The most common substrate/coating combinations:

Medium Area Mask Dimensions, Substrates and Coatings
 Dimensions Substrates Coatings
9” x 9” x 0.120” Quartz, Soda Lime Chrome, Aluminum, Iron Oxide
14” x 14” x 0.120” or 0.190” Quartz, Soda Lime Chrome, Aluminum, Iron Oxide
450mm x 450mm x 4.8mm Quartz, Soda Lime Chrome, Aluminum, Iron Oxide

 

Medium Area masks were produced in a variety of standard or custom sizes. Most commonly, they were imaged on Quartz and Soda Lime, to the specifications shown.

Common Specifications for Quartz with Chrome
 CD Size CD Mean to Nominal CD Uniformity Registration Maximum Defect Size
Plate Sizes:     9" x 9"        14" x 14"         450mm x 450mm
10.0µ ≤1.0µ ≤1.0µ ≤3.0µ 5.0µ
4.0µ ≤0.50µ ≤0.50µ ≤2.0µ 3.0µ
2.5µ ≤0.25µ ≤0.25µ ≤1.5µ 1.5µ
1.0µ ≤0.15µ ≤0.15µ ≤1.0µ 1.0µ
Common Specifications for Soda Lime with Chrome
 CD Size CD Mean to Nominal CD Uniformity Registration Maximum Defect Size
Plate Size:   9" x 9"  
10.0µ ≤1.0µ ≤1.0µ ≤3.0µ 5.0µ
4.0µ ≤0.50µ ≤0.50µ ≤2.0µ 3.0µ
2.5µ ≤0.25µ ≤0.25µ ≤1.5µ 2.0µ
1.0µ ≤0.15µ ≤0.15µ ≤1.0µ 2.0µ
Plate Size:   14" x 14" 
10.0µ ≤1.0µ ≤1.0µ ≤3.0µ 5.0µ
4.0µ ≤0.50µ ≤0.50µ ≤2.0µ 3.0µ
2.5µ ≤0.25µ ≤0.25µ ≤1.5µ 2.0µ
1.0µ ≤0.15µ ≤0.15µ ≤1.5µ 2.0µ
Plate Size:   450mm x 450mm
10.0µ ≤1.0µ ≤1.0µ ≤3.0µ 5.0µ
4.0µ ≤0.50µ ≤0.50µ ≤2.0µ 3.0µ
2.5µ ≤0.25µ ≤0.25µ ≤2.0µ 2.0µ
1.0µ ≤0.15µ ≤0.15µ ≤2.0µ 2.0µ

 

Infinite Graphics Incorporated now concentrates on providing CAD/CAM software to electronics industries such as PCB manufacturing, Solder paste stencil design, semiconductor manufacturing, electrical test and Raster Image Processing (RIP), and other areas requiring precision graphics software. IGI markets its diverse line of software products to electronics industries and markets worldwide. Contact us.