Mask Data Prep and OPC

Turning a finished layout into the data a mask writer can use, correcting for the optical distortions of the exposure and fracturing the result into writeable shapes.

Tier C: Not a Founder’s Game Yet Medium criticality

Software and compute rather than capital equipment, but it only exists as an adjunct to a mask shop India does not yet have.

What It Does

Turns a finished chip layout into instructions a mask-maker can use

Corrects for light distortion so the pattern etches correctly.
Errors made here get copied onto every single wafer.
Needs a mask shop customer, which India doesn't have yet.

India Position

Import dependency: Not established
Made in India today: None
MSME entry capital: Rs 3–5 Cr
Time to qualify: 18–30 months

Not established means we hold no sourced import figure for this input yet, not that India imports none of it. Read Made in India today for the domestic picture.

No Indian mask data prep operation exists, because there has never been an Indian mask shop or fab to serve.

What Breaks, and Who Could Fix It

What breaks

This is where a layout stops being a drawing and becomes manufacturing data, and errors introduced here are replicated onto every wafer.

Who could fix it

Requires expensive tool licences and significant compute. A realistic entry is as a partner to a foundry or mask shop rather than independently.

Best and worst case

Best case if this breaks

At mature nodes, optical proximity correction is comparatively modest, and the compute requirement is manageable.

Worst case if this breaks

Leading-edge correction is one of the largest computational workloads in the industry, run on datacentre-scale clusters for days per layer.

Best case to fix it

A compute-and-software services business rather than a manufacturing one, which suits India’s strengths precisely.

Worst case to fix it

Nobody buys mask data prep on its own. It is sold as part of a mask or a tapeout.

Representative Suppliers

Listing a firm documents the market as we understand it. It is not an endorsement, a recommendation, or evidence of any commercial relationship.

Supplier	Origin	Scale	Confidence
Synopsys Proteus mask synthesis.	United States	Mega	Verified
Siemens EDA Calibre computational lithography.	United States	Mega	Verified
D2S Computational lithography acceleration.	United States	Small	Reported
Photronics Data prep delivered as part of mask supply.	United States	Mid	Reported

Reading Key

Every entry carries the same five figures, so two inputs anywhere in the chain can be compared directly. What each one is, and what it is not:

Import dependency: The share of Indian demand for this input that is met by imports today. A percentage is published only where we can state the basis for it, and the build rejects a figure that has none. “Not established” means no sourced figure exists yet, not that the figure is zero; for the domestic picture, read “Made in India today” instead.
Made in India today: How much of this input is actually produced in India: none, pilot scale, partial, or established. This is the field to read when import dependency is not established.
MSME entry capital: What it would plausibly cost an Indian MSME to enter this input at the smallest viable scale, in crore rupees. Plant and equipment only; it excludes working capital and the qualification cycle.
Time to qualify: How long from a working sample to a qualified first shipment, once the line exists. Qualification, not construction, is what usually decides whether an entry succeeds.
India readiness tier: Our verdict on whether an Indian founder can realistically enter this input, derived from the four figures above and stated as one of three tiers.

The three tiers

Tier A: Buildable Now: Under roughly Rs 5 crore of entry capital and 12 to 24 months to a qualified first shipment. A founder can start here.
Tier B: Partnership or Distribution: There is real money here, but not in manufacturing the thing. The opening is in stocking, distribution, purity uplift or a licensed partnership.
Tier C: Not Yet: Requires a joint venture, a technology licence, or a multinational’s balance sheet. Worth understanding, not worth starting.

Made in India today

None: No Indian production we can identify. Demand is met entirely from abroad.
Pilot scale: Made in India at laboratory, pilot-line or single-customer scale only.
Partial: Real Indian production exists, but it covers part of the range or part of the demand.
Established: Indian production is routine and qualified, at commercial volume.

Confidence

Confidence describes how well evidenced our listing is. It is not a rating of the supplier or of its products.

Verified: Checked against a primary source: the firm’s own filing, product documentation or announcement.
Reported: Consistently reported by trade press or industry analysts, but we have not seen the primary document ourselves.
Likely: A credible supplier for this input given their product range, though we have not confirmed that they actually supply it.
Directional: Included to show the shape of the market. Read it as an observation, not as a claim about this firm.

Scale

Scale is a bucket, not a revenue figure. We publish a band we can hold for years rather than a number that is stale in a quarter.

Mega: A global top-tier firm that effectively sets the price and the standard for this input.
Large: A major international supplier, usually with plants or sales in several regions.
Mid: An established specialist, often strong in one region or one product family.
Small: A niche or regional supplier. Frequently the realistic first partner for a new Indian entrant.