RSO Series

Reflow soldering systems with vacuum and high vacuum

Unitemp's RSO series consists of laboratory ovens designed for flux-free reflow soldering processes. Thanks to their space-saving, compact design, these units are particularly well-suited for developers working on the implementation and research of new processes. In addition, they can also be used for small-batch production or mass production.

RSO soldering systems operate with standard process gases and feature fast heating and cooling rates. Depending on the model, they can process substrates up to 300 x 300 x 40 mm in size or wafers with a diameter of up to 8 inches. The touch panel and the SIMATIC® controller enable simple and convenient programming directly on the device. With the optional accessories, the devices can be optimally adapted to specific requirements.

  • Precise heating and rapid cooling rates
  • Up to 4 gas lines
  • Heating via infrared lamps
  • 50 programs, each with 50 steps
  • Integrated data logging
  • Compact design

  • Easy to maintain
  • Flux-free reflow soldering processes
  • Operation with inert gas, oxygen, hydrogen, forming gas, formic acid
  • SMT reflow soldering (lead-containing and lead-free)
  • High-temperature reflow soldering of ceramic/alumina hybrid assemblies
  • Pin-in-paste reflow soldering
  • Semiconductor applications
  • LED assembly

Reflow soldering ovens in comparison

Vacuum up to 1x10-3 hPa RSO-210 RSO-300
Vacuum up to 5x10-6 hPa Check Check
Max. substrate size 210x210 mm² 300x300 mm²
max. Temperature 650 °C 650 °C
Chamber height 40 mm 40 mm
Max. ramp up rate 10 K/sec 10 K/sec
Max. ramp down rate Up to 200 K/min Up to 200 K/min
Process gas line - Mass Flow Controller
5 nlm Nitrogen - Mass Flow Controller
5 nlm Nitrogen
Controller SIMATIC 7“ touch p. SIMATIC 7“ touch p.
Dimension (WxDxH) 505x525x570 mm 578x496x570 mm
Weight 60 kg 70 kg

Available options

Options RSO-210 RSO-300
Extended Chamber height -EH - -
Temperature extension -HT 1000 °C On request
Formic acid module with separate gas line incl. Interlock (external) FA I Check Check
Formic acid module with additional separate gas line (internal) FA II - -
Formic acid module with shared gas line incl. Interlock FA III - -
Formic acid module with automatic refill station FA IV - -
Oxygen analyzer (not tolerant against H2 traces) Ox I Check Check
Add. Gas lines with Mass flow Controller MFC Max. 4 pcs Max. 4 pcs
Add. Flexible thermocouple with external conn. TC I Max. 1pc Max. 1 pc
Add. Flexible thermocouple with internal conn. TC II Max. 1pc Max. 1 pc
Vacuum up to 3 hPa VAC I Check Check
Vacuum up to 10-3 hPa VAC II Check Check
Vacuum up to 10-6 hPa HV Check Check

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