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Texturing Agent

Texturing agent is controlling etching speed by adding additives, formed pyramid and selective etching available. Additives are improve surface tension and diffuse behavior for control appropriate etching speed to form pyramid.

Product Name: STA-007

Texturing Agent for Single Crystalline Silicon Wafers is an effective etching additives, IPA using in broad way. IAP is improving surface wetting, reaction ability and control etching speed. Function is removal of hydrogen bubble sticking on the silicon wafer surface and control texturing phase. But etching contained IPA has some disadvantages, optimum etching speed are around the IPA boiling point of 82.4. Isopropyl alcohol is continuously evaporate during the texturing process. Etching composition is continuously change . Few decline of reproducibility due to the etching fluctuation.

To solve these KOH/IPA etching solution problems, we have developed STA-007 (Korean Patent No.10-1213147 ) is improve process stability, reduce production time. Appropriate etching process of inline and vertical texturing agent is environmentally friendly agent.

Item

Specification

Remarks

Main component

Alkali-Silicate Metallic Salt 

FT-IR spectrometer

Appearance

Viscous Simi-transparent Liquid 

Visual test

Specific Gravity (at 20)

1.02~1.03 

Hydrometer

Fisher Scientific

pH (at 20)

11.0~12.0 

pH meter

Orion 520A

Solubility (Water)

Complete miscible

Visual test

Viscosity (cps at 20)

20~30 

Remarks)1

Item

STA-007

IPA

Remarks

Etching (g)

0.75

0.75

 156156mm 

 Vertical etching to Single Crystalline Silicon Wafers for Solar Cell

 

 

Etching time (min)

21

40

Etching Temp. ()

80

75

pyramid size ()

2.2 ~ 2.5

3.9 ~ 4.5

Texturing Agent for Single Crystalline Silicon Wafers