OGS.AR Capacitive Screen Turnkey Solutions

Turnkey project, large equipment including multi-layer coating machine, exposure developing machine, etching stripping machine, etc. 

DescParam CaseImages

In the capacitive touch screen, between the electodes, there is a slight current change by touching.By analyzing the current changes, the controller can detect the exact position of the touch. HCVAC can provide whole set capacitive touch screen vacuum coating equipment( includes : ITO transparent conductive film continuous coating production line, continuous metal layer coating production lines and surface hardened layer continuous coating production line) or provide a capacitive touch screen assembly whole plant turnkey projects.

 

Main process:

glass sheet→ITO coating→lithography process→insulation bridge→metal layer coating→lithography process→surface hardened layer

single-ito

double-ito

 
Advantage :
• Scientific system of the whole plant planning
• Optimizied building cost
• Vertically integrated production lines, equipment , process .

Core competencies:
•ITO/Metal coating equipment& coating technics
•ITO/Metal coating equipment& coating technics
•Modules processing technology
•IC supplier introduction
•Touchscreen evaluation practices
•Touch screen quality control method

电容屏结构图
                                              Capacitive screen Structure

Thermal performance

 

thermal conductivity λ (25 °C)
0.96 W/(m•K)
thermal capacity Cp (20 °C; 100 °C)
0.84 KJ/(g•K)
average line ecpansion rate平均线膨胀率 α (20 °C; 300 °C)
8.8 • 10-6 K-1*
glass transition temp Tg
615 °C
annealing point (1013 dPas)
635 °C
softening point (107.6 dPas)
880 °C
operating point (104 dPas)
1265 °C

 

*Cooling according to DIN standards

Electrical Performance*

 

Frequency
Permittivity
Loss factor
 
MHz
ε´
tanδ
1
7.74
0.011
54
7.49
0.008
480
7.40
0.009
825
7.38
0.010

 

912
7.38
0.010
1977
7.35
0.012
2170
7.35
0.012
2986
7.34
0.012
Volume resistivity ρD (A.C. at 50Hz)  
v = 250 °C  
1.5 • 106 Ω•cm
v = 350 °C  
8.9 • 104 Ω•cm

Chemical stability

Water resistance DIN ISO 719   HGB 1
Acid DIN 12116   S 4
Acid DIN ISO 695   A 1

Optical performance

refractioin index
  588 nm (nd) 633 nm
780 nm
glass center 1.508 1.506
1.502
       
KNO3 exchanged compressive stress layer  1.516 1.514
1.510
Transmittance (glass thickness0.7mm)  
--- 840 nm    
>91.5 %
--- 560 nm    
>91.5 %
--- 380 nm    
>90 %
Photoelastic coefficient  
29.2 nm/cm/MPa

Mechanical performance

 
Density 2.477 g/cm3*
Youg modulus E 74 kN/mm2
Poisson's ratio 0.215
Knoop harness HK 0.1/20  
Before harden 534
After harden 693
*Cooling according to DIN standard. 

Chemically strengthened

 
surface stress Can reach 900 MPa
Ion exchange depth Can reach 50 μm
4 point bending stength Can reach 800 MPa
3.5 inch capacitive screen 5.0 inch capacitive screen 8.0寸 inch capacitive screen DITO capacitive screen SITO capacitive screen Capacitive screen high permeability DITO/SITO
capacitive screen touch screen capacitive screen