SVG Silicon Valley Group HMDS Refill Canister 99-54149-01 for ASML 90S DUV

Product Overview

The SVG Silicon Valley Group HMDS Refill Canister, part number 99-54149-01, is a specialized consumable component designed for use with the ASML 90S DUV deep ultraviolet lithography system. This canister contains high‑purity hexamethyldisilazane (HMDS), a chemical primer that promotes adhesion of photoresist to silicon wafers. The vapor‑phase delivery system ensures uniform coating and minimizes contamination.

Chemical Composition and Purity

The canister is filled with electronic‑grade HMDS with a purity of 99.999% (5N). The liquid is contained in a stainless‑steel vessel with an integral dip tube and a pressure‑regulating valve. The vapor pressure at 20 °C is approximately 20 mbar, allowing consistent vapor extraction without carrier gas. Each canister is individually tested for trace metals (below 1 ppb) and moisture content (below 10 ppm) to meet the stringent requirements of DUV photolithography.

Technical Specifications

• Part Number: 99-54149-01

• Chemical: Hexamethyldisilazane (HMDS), CAS 999-97-3

• Volume: 500 mL liquid (provides approximately 2000 wafer priming cycles)

• Delivery Pressure: 0.5 – 1.0 bar (regulated internally)

• Connector Type: CGA‑660 outlet with 1/4” VCR fitting

• Material of Construction: 316L stainless steel, PTFE seals

• Leak Rate: < 1x10⁻⁹ mbar·L/s (helium leak tested)

• Storage Temperature: 10 °C to 30 °C, away from oxidizers

Functional Role in ASML 90S DUV

In the ASML 90S DUV system, the HMDS canister is installed in the vapor prime module. During the priming step, a metered flow of HMDS vapor is directed into the wafer processing chamber, where it reacts with hydroxyl groups on the silicon surface to form a hydrophobic monolayer. This layer significantly improves photoresist adhesion, reducing undercut and lift‑off failures in subsequent pattern transfer steps. The vapor delivery is precisely controlled by the system’s mass flow controller, ensuring reproducible adhesion across all wafers.

Installation and Replacement

Installation must be performed in a well‑ventilated area using appropriate personal protective equipment (nitrile gloves, safety goggles). First, isolate the supply line and close the main valve on the old canister. Disconnect the VCR fitting using a compatible wrench, taking care not to cross‑thread. Attach the new canister with a fresh metallic gasket, and tighten to the specified torque (30 Nm). After connection, perform a leak check using an electronic leak detector. Then purge the line with nitrogen for 60 seconds before opening the canister valve. The system will automatically detect the new canister via a pressure sensor and reset the remaining cycle counter.

Maintenance and Safety

HMDS is flammable and moisture‑sensitive; always store the canister in a cool, dry place away from acids and water sources. The canister is a single‑use item; do not refill or reuse. When the system indicates low level (approx. 10% remaining), order a replacement. The used canister must be emptied and rinsed with inert solvent before disposal, according to local environmental regulations. Routine inspection includes checking the valve for smooth operation and verifying that the pressure gauge reads within the green zone. If the pressure drops below 0.3 bar, the canister may be depleted or the regulator may be faulty.

Compatibility and Ordering

This canister is specifically designed for the ASML 90S DUV platform and is not interchangeable with earlier SVG models without an adapter kit. When ordering, always reference the full part number 99-54149-01 to ensure correct chemical grade and connector type. The product is supplied with a material safety data sheet (MSDS) and a certificate of analysis. It is recommended to keep one spare canister on hand to avoid production downtime.