New Product: OK International thermal technology enhances tabbing and bussing soldering

Facebook
Twitter
LinkedIn
Reddit
Email

Product Briefing Outline: OK International has developed a proprietary ‘SmartHeat’ Technology, which consists of a high frequency alternating current (AC) power supply and a self regulating heating element. The heater utilizes the electrical and metallurgical characteristics of two different metals: copper, and a magnetic material with high resistivity to reduce micro-cracking of solar cell substrates during the soldering operation.

Problem: Micro cracking of delicate solar cell substrates is a common defect that can occur during PV tabbing and bussing soldering processes. The soldering temperature must be reduced to a minimum so that the solar cells are not subjected to mechanical or thermal stresses from the soldering process. During the soldering operation, differential thermal expansion of the copper and the silicon elements can occur at temperatures greater than 300°C. This differential can result in the formation of micro-cracks that may not be detected during the manufacturing process and result in reduced field lifespan. The need for precise time and temperature control is made additionally critical by the precise intermetallic layer requirement of 1-2µm that must be created during the solder joint formation.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Solution: The SmartHeat PS-900 soldering system with specially designed STV-DRH440A hoof tip geometry optimizes the power delivered to the solder joint, thus providing high performance efficiency with increased tip life. Its temperature-sensitive “T “heater series ensures low temperature soldering and thus minimizes thermally induced stresses on the surface of the solar cells.

Applications: c-Si cell tabbing and bussing soldering processes.

Platform: SmartHeat Technology consists of a high frequency alternating current (AC) power supply and a self regulating heating element.

Availability: March 2010 onwards.

Read Next

July 11, 2025
The Australian Energy Market Operator (AEMO) has revealed that several utility-scale solar PV power plants experienced curtailment of above 25% in the National Electricity Market (NEM) in 2024.
July 10, 2025
German renewables company BayWa r.e. has secured a €3 billion (US$3.5 billion) loan for 'operational initiatives and pipeline expansion.'
July 10, 2025
US renewables developer Invenergy has launched commercial operations of 250MW Fairbanks Solar Energy Center in Sullivan County, Indiana. 
July 10, 2025
US solar residential installer Sunnova has entered into a stalking horse asset purchase agreement with Omnidian for some of its assets.
July 10, 2025
A report published by the US Department of Energy (DOE) this week claims that the previous government’s support for renewable energy could cause blackouts to “increase by 100 times” by 2030.
July 10, 2025
UbiQD has signed a supply agreement with First Solar to supply its fluorescent quantum dot technology for use in the latter’s PV panels.

Subscribe to Newsletter

Upcoming Events

Media Partners, Solar Media Events
September 2, 2025
Mexico City, Mexico
Solar Media Events
September 16, 2025
Athens, Greece
Solar Media Events
September 22, 2025
Bilbao, Spain
Solar Media Events
September 30, 2025
Seattle, USA
Solar Media Events
October 1, 2025
London, UK