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Conventional white LEDs are fabricated from a combination of blue emitting diodes and yellow phosphorescent material.
Some of the blue light is absorbed to make yellow light, and some is transmitted.
A precise ration of blue and yellow is required to make a specific white.

YWafer-YB (yellow and blue) was built on the fundamental design of the YWafer-GS transmission measurement mapping where the broad
band transmission source was replaced with a standard blue LED typically used to make the above type of white light emitting diodes.

YB Concept

In order to properly characterize the phosphor emission and light dispersion, multiple angles of measurement are provided.
(typically 45 or 60 degree from normal).
This allows detailed analysis of the color coordinate dispersion across the wafer.


YWafer YB is designed to provide the best reproducibility in wafer to wafer comparison and aims to help phosphor plat
makers attain the uniformity and color target for white LED fabrication.

Both YWafer GS4 and RD8 can be configured for phosphor characterization, but only RD8 can also be configured to measure the phosphor thickness, another important parameter.

Latest News and Events

2021.05.26: Start of Sales and Technical Support for DOBOT's Collborative Robots


DOBOT 協働ロボットCRシリーズは、3kg、5kg、10kg、16kgまでのペイロードを持つモデルから選択できるコストパフォーマンスの高い6軸ロボットアームです。簡単にセットアップができて、衝突検知、軌道再現などの機能が充実しています。また、直感的で使いやすく、制御しやすいハンドティーチング機能で人間とロボットの協働作業を安全に行えます。

2020.11.09: CS Live II Presentation

See the pesentation by Dr. Lacroix from our booth at the CS Live II conference in November 2020, entitled "Beyond the PL Mapper".

2020.03.29: CS International Conference

Come visit us in Brussels at the CS International Conference!

(Currently postponed due to COVID-19)

2019.02.14: New Wafer Mapping Products Lineup

YWafer2019 brings new products and featues to our already versatile wafer mapping product line YWafer Mapper.

YWAFER-GS3 has now been discontinued as 2 to 3 inch wafer mapping is supported by both our GS4 and RD8 models.  We will consider supplying GS3's only upon special requests or volume orders.  YWAFER-YB products have also merged with the GS and RD series as special configurations of those models.

The current models, separated by mapping area capacity and loading methods is now as follows:

  GS4 RD8 -WL26 -WL48
up to 4 inch mapping (100x100 mm) 
up to 8 inch mapping (200x200 mm)   
2 to 6 inch robotic wafer loading      
4 to 8 inch robotic wafer loading      
over 8 inch mapping or loading Available as special order

 For more detailed information on the various capabilities and configurations that will best suite your needs, please contact us.

2017.01.21: Taiwan Patent Granted

YSystems was awarded patent number I 567377 (APPARATUS AND METHOD FOR MEASURING A LUMINISCENT DECAY) by the Taiwan Patent office. 

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