A capacitive touch screen is an all-glass sensor made by coating tin antimony oxide (TAO) on the surface of the glass substrate, for which the human body's innate capacitance can be used. It enables smooth operation in almost any kind of environment and even amid poor operating conditions. Capacitive touch screens are not affected by outside elements and exhibit high clarity. Because of such features, capacitive touch screens are widely use in applications such as outdoor kiosks, industrial environments, guide systems, POS, etc.

Its structure and operating principles are as follows.

As shown above, it is composed of one sheet of glass substrate without using any top layer. It also features higher light transmittance and better surface durability. But since it does not react to gloved hands or nonconductive materials, limited input devices like the fingers must be adopted. An electrode pattern is printed along the edge on the conductive layer. The glass overcoat is also fused over the conductive coating to protect and seal the sensor.

Advantages of INO CT

• High sensitivity-slight touches can be easily detected
  
• Good durability with its special metal coating
  
• Long life (100 million touches)
  
• Great endurance in tough environments of weather, contaminants, or liquid Excellent light transmittance

Product specification/models

MECHANICAL
Structure: Glass 3.3mm, 4.0mm, 5.1mm,10 % (T)
Sensor Sizes: 15.0"~19.0" Custom sizes
Input Method: Finger
Hard coat Pencil Hardness: Meets pencil hardness 7H
Surface Durability:10k times (250gf, pen speed 1005mm/sec)

OPTICAL
Light Transmission: 90% ↑(550nm wavelength optimized for flat-panel displays)
Coating: Clear overcoat

RELIABILITY
Touch Life: More than 100 million touches in a single location

ENVIRONMENTL
Usable Temperature: Operating: -20℃~ 70℃

 Humidity 90% RH at max 35℃
Storage Temperature: Storage: -40℃ ~ 80℃

 Humidity 90% RH at max 35℃
Relative Humidity: 25 ~ 90% Temperature: 20?,2?C, Humidity: 65.5% RH
Humidity Test:60?,2?C and 90~95% relative humidity
Thermal Shock Test: -40℃,2℃/30min, 80℃,2℃/30min (10cycles)

ELECTRICAL
Touch Resolution: 2048 x 2048 or more
Accuracy: Standard Deviation of error is less than 2% on most displays.
Power requirements:4.9~5.1VDC (Max. 100mA, typical 90mA,50mA peak to peak max. ripple)
Operating temperature:0℃ to 50℃ 
Storage temperature: -40℃ to 80℃
Relative Humidity: 95% at 60℃
Protocol: RS232 Model: 9600 bauds, None parity, 8 data bits, 1 stop bit
Report rate: RS232 Model: Max. 160 points/sec