They've been active in photonics for many years.
Here's a look at what they patented in early 2000 :
http://patents.justia.com/search?q=DenseLight+Semiconductors
Even more interesting are the patents granted to Yee Loy Lam, DenseLightChief Technology and operating officer and Yuen-Chen ChanVP engineering (photonics) :
http://patents.justia.com/search?q=Yee+Loy+Lam
http://patents.justia.com/search?q=%09+Yuen-Chuen+Chan
Abstract :
Publication number: 20020004253
Abstract: In a method of manufacturing a photonic integrated circuit having a compound semiconductor structure having a quantum well region, the structure is irradiated using a source of photons to generate defects, the photons having energy (E) at least that of the displacement energy (ED) of at least one element of the compound semiconductor. The structure is subsequently annealed to promote quantum well intermixing. The preferred radiation source is a plasma generated using an electron cyclotron resonance (ECR) system. The structure can be masked in a differential manner to selectively intermix the structure in a spatially controlled manner by controlling the exposure portions of the structure to the source of radiation.
Type: Application
Filed: March 8, 2001
Publication date: January 10, 2002
Inventors: Boon Siew Ooi, Yee Loy Lam, Yuen Chuen Chan, Yan Zhou, Geok Ing Ng
