Skip to content
SemiXperts
RefurbishmentUpgradesMaintenanceInstallation
AG Associates

AG Associates Heatpulse 610 rapid thermal processor

Pieces, 50 mm (2 in), 75 mm (3 in), 100 mm (4 in), 125 mm (5 in), 150 mm (6 in) · 1980s–2000s

The Heatpulse 610 is a lamp-heated, atmospheric RTP found in many research cleanrooms for implant anneal, contact alloying and silicides. We inspect, refurbish and upgrade used systems.

Price on request

Where the Heatpulse 610 fits

AG Associates built the Heatpulse 610 as a single-wafer rapid thermal processor with tungsten-halogen lamps above and below a quartz isolation tube. It became one of the most common RTP tools in university and III-V research cleanrooms, and derivative systems are still built today. A used Heatpulse 610 suits labs that need short, controlled anneals: implant activation, ohmic contact alloying, silicide formation, oxide densification and reflow.

It is an atmospheric tool with a simple gas system and a small footprint, which makes it easy to install and maintain. The trade-off is that it cannot run under vacuum and its temperature measurement needs attention. For the rest of our thermal range, see thermal processing equipment.

Temperature measurement is the key question

Most Heatpulse systems control temperature with a pyrometer that reads the underside of the wafer. That works well at high temperature on bare silicon but drifts with emissivity changes from films, dopants and backside coatings. Thermocouple control, either with a thermocouple wafer or a configuration built for it, is better for low-temperature contact alloys. We record which sensing your system uses, calibrate it against a reference and note emissivity limits in the report. If your samples vary widely in backside films or doping, plan on a periodic check with a thermocouple wafer rather than trusting one calibration.

What we inspect

  • Lamp banks: every lamp checked for continuity, with lamp sockets and reflectors inspected for discolouration or damage
  • Quartz isolation tube and wafer tray for devitrification, cracks and deposits
  • Lamp power control and SCRs under load
  • Pyrometer window, alignment and calibration
  • Gas flows, purge timing and door seal
  • Cooling water and air flow to the lamp housing
  • Controller operation and recipe storage

Common wear points are lamps, gold-plated reflectors that tarnish with heat, quartz tubes, lamp sockets, pyrometer calibration and ageing control electronics.

Refurbishment and upgrades

We replace failed lamps, clean or replace quartzware and reflector surfaces, rebuild power control where needed and calibrate the temperature loop. Certified systems run a test anneal on implanted or coated wafers with sheet resistance or other agreed results in the report.

The most common upgrade is a new controller and software, which brings recipe storage, logging and better closed-loop control to an older unit. Our post on keeping legacy tools running explains how we decide between repairing original electronics and replacing them, and the repair and troubleshooting service covers systems you already own.

Facilities you will need

  • Three-phase power for the lamp banks, rating depending on configuration
  • Cooling water for the chamber and lamp housing
  • Clean dry air for cooling and pneumatics, depending on configuration
  • Nitrogen, plus argon, oxygen or forming gas as your processes require
  • Exhaust for the purge gas outlet

Buying advice

Decide your temperature range first, then check that the sensing matches it. Ask how many lamps have been replaced recently and whether the reflectors are original. Confirm that the tray suits your wafer sizes and materials, and plan a calibration after installation, since moving the tool can shift pyrometer alignment.

Specifications

Typical configuration

Wafer sizes
Pieces, 50 mm (2 in), 75 mm (3 in), 100 mm (4 in), 125 mm (5 in), 150 mm (6 in)
Heating
Tungsten-halogen lamp banks above and below a quartz isolation tube
Chamber
Atmospheric pressure, purged with N2, Ar, O2 or forming gas, depending on configuration
Temperature
Up to about 1,150 °C with pyrometer control, depending on configuration
Ramp rate
Up to about 200 °C/s, user programmable
Temperature sensing
Pyrometer, with thermocouple control for lower temperatures, depending on configuration
Substrates
Pieces and wafers up to 150 mm (6 in) on trays or susceptors

Typical values for the platform. Each tool’s inspection report lists its actual configuration.

Services

What we do for the Heatpulse 610

Refurbishment

Rebuild used tools to their original specification, with a written scope and a test report.

Learn more

Upgrades

Retrofit older tools with new controls, light sources, pumps, wafer sizes or endpoint detection.

Learn more

Maintenance

Keep older process tools running with planned maintenance, repair, calibration and parts.

Learn more

Installation

Moving a process tool from one cleanroom to another, and getting it running at the new site.

Learn more
Upgrades

Common upgrades

About upgrades
  • PC-based controller and software in place of the original control unit
  • New pyrometer or thermocouple control for low-temperature work
  • Lamp driver and SCR power control rebuild
  • Susceptors and trays for small pieces and III-V wafers

Need a spare part for the Heatpulse 610? Send us the part number and we will check what we can supply.

FAQ

Questions and answers

Can a Heatpulse 610 run in vacuum?

No. It is an atmospheric system with gas purge, typically nitrogen, argon, oxygen or forming gas. For vacuum annealing you need a different RTP or a furnace.

Is temperature control reliable at low temperatures?

Pyrometers lose accuracy at low temperatures, so for contact alloying below roughly 400 °C a thermocouple configuration works better. We check which sensing your system has and calibrate it.

Are parts still available for such an old tool?

Yes. Derivative tools such as the Allwin21 AccuThermo AW 610 follow the same design, and lamps, quartzware and electronics are available from the aftermarket. Original controller boards are the weakest point.

Can I anneal GaAs or other III-V wafers?

The Heatpulse 610 is widely used for III-V contact alloying and implant anneal, usually with a graphite susceptor or proximity cap. We supply suitable trays if your system lacks them.

Thermal processing

More tools in this category

All thermal processing
Guides

Related reading

All guides
Next step

Interested in the AG Associates Heatpulse 610?

Tell us the process, wafer size and facilities. We reply with availability, an inspection report and a refurbishment scope.