Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn

4-Inch LED Wafer Scribing
Oct 2005
IPG Photonics, Microsystems Div.Request Info
Uses ChromaDice Laser System
HOLLIS, N.H., Oct. 6 -- JP Sercel Associates (JPSA) has developed a scribing process for four-inch LED wafers. This larger format was recently introduced by Tekcore Co. Ltd., a Taiwan manufacturer of high-brightness LED chips in 450 to 480-nm (blue), 495 to 510-nm (cyan), 510 to 530-nm (green) and ultraviolet LED 370 to 430-nm wavelengths.
   JPSA developed the scribing process using its ChromaDice ultraviolet diode-pumped solid-state laser system, which delivers high-speed wafer scribing with typical yields greater than 99 percent at very low operating costs, the company said.

"ChromaDice cuts a well-defined chip, with consistently narrow cuts as small as 2.5 microns," JPSA said in a statement. "Narrower streets permit increased die population, adding value to each wafer. With its high throughput and minimal impact on device performance, the process is tolerant of wafer warp and bow and delivers very fast scribing speeds compared to other methods using an advanced 266-nm (or 355-nm) DPSS laser process."

ChromaDice has a footprint of 60 by 42 inches and features an air-cooled laser, motion control, beam delivery and video inspection. It has a true, unmapped position radius of 2 microns over a 100 by 100-mm-square area and a stage orthogonality of more than 2 arc seconds.

Scribing of four-inch wafers can be difficult due to handling and bowing issues. Bowing of unthinned wafers can potentially reach 1 centimeter, creating processing problems. JPSA's process involves scribing a wafer that is held precisely in a vacuum fixture that corrects wafer bowing consistently to within a few microns, ensuring precise scribing for optimum yields.

For more information, visit:; e-mail:

JP Sercel Associates Inc.
17D Clinton Drive
Hollis, NH 03049
Phone: (603) 595-7048
Fax: (603) 598-3835


* Message:
(requirements, questions for supplier)
Your contact information
* First Name:
* Last Name:
* Email Address:
* Company:
Address 2:
Postal Code:
* Country:
Phone #:
Fax #:

Register or login to auto-populate this form:
Login Register
* Required

When you click "Send Request", we will record and send your personal contact information to IPG Photonics, Microsystems Div. by email so they may respond directly. You also agree that Photonics Media may contact you with information related to this inquiry, and that you have read and accept our Privacy Policy and Terms and Conditions of Use.
ChromaDicehigh-brightness LED chipsindustrialJP Sercel AssociatesJPSALED wafersphotonicsProductsscribing processTekcore

Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
Are you interested in this product?
When you click "Send Request", we will send the contact details you supply to IPG Photonics, Microsystems Div. so they may respond to your inquiry directly.

Email Address:
Stop showing me this for the remainder of my visit