News Article

Peter Wolters Reduces LED Substrate Polishing Time By Half

The firm says its new polishing slurry for C-plane sapphire substrates does not require any exceptional processes or procedures beyond what is typical to conventional colloidal silica.

Peter Wolters is introducing to the LED market a new polishing slurry that has demonstrated a 50% reduction in the time required to complete final polishing for flip chip or through substrate LED’s.


The new Peter Wolters slurry reaches the surface roughness endpoint in half the time compared to the standard colloidal silica slurry.


This development utilizes a combination of chemical and abrasive technologies to decrease the cost of ownership or the manufacturing cost of the LED when manufactured on C-plane sapphire. “As demonstrated by our testing, the time required to achieve a comparable final surface finish has been reduced by half in substrates of identical incoming quality", said David Suica, President of Peter Wolters of America, the Peter Wolters Competence Center for Sapphire Polishing.

The quality and clarity of the final polished surface is comparable with the utilization of colloidal silica, which is commonly utilized in the final polishing step.

This quality slurry product is completely mixed and tested by the Peter Wolters in-house professional team of scientists and engineers to maintain the highest levels of consistency and quality. The premixed slurry is shipped in a concentrated form, which can be easily thinned to the proper point of use consistency by adding DI water. Handling and storage of this custom slurry does not require any exceptional processes or procedures beyond what is typical to common colloidal silica.

Peter Wolters of America is a subsidiary of Peter Wolters GmbH, a manufacturer of high precision machine tools, headquartered in Rendsburg, Germany. Peter Wolters of America provides a complete line of high quality machine tools, OEM spare parts, accessories and factory trained service engineers.

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