MMT Announces Ultra-thin Optical Finger-print Sensor For Smart Phone and Other Applications

28th Nov 2019

Micrometorics Technologies with its headquarter in Singapore (hereinafter referred to as MMT) has successfully developed the industry ultra-thin in-display optical fingerprint sensor.  The thinnest sensor chip is 0.37mm and its module thickness is only 0.55mm.  It is well-suited to multiple biometric security applications, including Smart Phones, Door Locks, Smart Access Systems, Online Gateways, as well as industrial fingerprint authentications. 

In the past few years, the biometric authentication features have been used for the purpose of smartphone security.  The most common ways are either Face Recognition using the front camera, or Finger-print Authentication using a fingerprint sensor attached to the front / side / back body.  However, in recent years, using thin-bezel displays for smart phone as opposed to large displays is becoming a trend, there is no space in the front body to integrate the traditional capacitive fingerprint sensor. Also, to improve the usability and security of internet online payments, smartphone manufacturers all over the world have adopted the more reliable in-display optical fingerprint sensor replacing the capacitve ones.  

Currently, using a near-field single-lens camera module for such in-display fingerprint sensor is the mainstream.  But this type of sensor module requires a certain focus length which eventually makes the module too thick to mount under the display.  The typical thickness is said to be around 3.5mm, and it is hard to have such space in current 5G smart phone inner mechanism.  Therefore, MMT’s ultra-thin fingerprint sensor will ameliorate the headache of space limitation in mobile phone ID design. It can be mounted anywhere on the middle-frame with a gap of 0.6mm under the OLED display for finger-print authentication use.

Mudule Size:15mm x 13.2mm x 0.55mm       Sensor Area:5.5mm x 3.5mm

Another issue brought up in the current product is that it needs to boost up the brightness of the OLED when performing the function.  This will definitely shorten the life cycle of the OLED panel.  But this is unecessary if MMT’s fingerprint sensor were to be used.

Moreover, the sensor can be used under the transparent glass.  The resolution of the fingerprint image can be achieved above 2000dpi.  It becomes the next generation of fingerprint sensor equipped with the intelligent fingerprint authentication algorithm which can differentiate the live fingerprint and recognize more biometric information hidden in deeper levels, like the shape of the ridge and sweat pores etc. 

MMT since its inception has partnered with DDS, Inc., a Japanese fingerprint authentication solution provider who developed the next-generation fingerprint algorithm covering the sweat pore recognition.  The first result was published in March 2018 as a joint-project launched between DDS and the University of Tokyo.  The combination of MMT’s fingerprint sensor hardware and DDS’ cutting-edge algorithm makes it possible to realize an unprecedented biometric security solution.