Used TEL Trident & DRM Etch: Verify Before You Buy
Evaluating a used TEL Trident or DRM etch listing? Verify platform identity, chamber configuration and process acceptance before requesting a quote.
If a used-tool listing is labeled “TEL Trident” or “DRM,” start by requesting the platform nameplate and chamber identifiers. Have the seller reconcile the listing title with the equipment documents before discussing performance or price.
Resolve platform and chamber identity first
Tokyo Electron's UNITY product page identifies DRM as a chamber option on the UNITY Me+ platform for SiO2/SiN etch.
Use that documented distinction to frame your questions: which platform is being offered, which chambers are installed, and which configuration was actually qualified? Do not approve an offer based on the word “DRM” alone.
Ask for a configuration pack containing:
- Platform manufacturer, model, serial number and nameplate photos.
- Each chamber's identity, serial number, revision and installed options.
- Wafer-handling configuration and the documented substrate requirements.
- RF, matching, gas-delivery, pumping and endpoint hardware identifiers.
- Installed software details, manuals and the scope of any support arrangement.
Match the tool to the intended etch process
Have your process owner specify the film stack, mask, substrate, target profile, throughput goal and required metrology. Ask the seller to provide process evidence for the exact offered configuration.
Request a written review of proposed substitutions or upgrades. Ask which components and qualification work are included in the quote, who will perform that work and what acceptance evidence will be delivered.
Acceptance criteria before purchase
Build a witnessed acceptance plan with your process engineer and qualified equipment personnel.
- Configuration audit: reconcile the installed hardware and serial numbers with the signed scope.
- History review: obtain maintenance, chamber-cleaning, prior-process and decommissioning records for review.
- Equipment checks: define vacuum, RF, gas-delivery, wafer-transfer and interlock checks using the applicable manufacturer procedures.
- Process demonstration: run agreed test wafers and record settings, metrology method and results.
- Disposition: compare the agreed etch rate, uniformity, selectivity, profile and defect measurements against buyer-approved limits.
Specify the number of demonstration runs and how exceptions will be resolved. Do not use an arbitrary over-rate stress test or a generic erosion threshold as a substitute for an approved procedure.
Compare complete, documented offers
Request separate pricing for the system, included support equipment, missing parts, inspection, decontamination, packing, freight, installation and qualification. Confirm who owns each deliverable.
Related etch buying resources
Use these pages for additional sourcing questions; validate all fit claims independently:
RFQ checklist: send the exact platform/chamber identities, intended process, configuration requirements and proposed acceptance plan.
Related Parts
Caladan stocks used and refurbished parts referenced in this article — tested, inspected, and ready to ship.