Electronic wet chemicals are one of the most indispensable materials for the production process of display panels, semiconductors, solar cells, etc. Its chemical property not only directly attributes to the quality of the final electronic products but also significantly impacts microelectronics manufacturing and industrialization.
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What are electronic wet chemicals?
Electronic wet chemicals, also known as ultra-clean and high-purity reagents, with the major component&#;s purity greater than 99.99%. It is generally required to control the particle size of impurity particles to be less than 0.5 μm and the content of metal impurities to be less than the ppm level. Electronic wet chemicals are reagents with the highest requirements regarding particle control and impurity content among chemical reagents.
Electronic wet chemicals are a subbranch of electronic chemicals, and various liquid chemical materials are used in the manufacturing process of microelectronics and optoelectronics. According to their compositions and applications, electronic wet chemicals can be further divided into general wet electronic chemicals and functional wet electronic chemicals. General electronic wet chemicals are single-component and single-function liquid electronic chemicals that are widely used, such as acids, alkalis, organic solvents, etc. Functional electronic wet chemicals refer to chemicals that achieve special functions and meet process requirements in manufacturing through compounding methods, such as stripping liquid, developer, etching liquid, cleaning liquid, etc.
Specific classifications of electronic wet chemicals
Category
Subcategory
Product Name
General Electronic Wet Chemicals
Acids
Hydrofluoric acid, nitric acid, hydrochloric acid, sulfuric acid, acetic acid,
etc
.
Alkalis
Ammonia, sodium hydroxide, potassium hydroxide,
etc
.
Organic solvents
Alcohols
Methanol, ethanol, isopropanol,
etc
.
Ketones
Acetone, butanone, methyl isobutyl ketone,
etc
.
Esters
Ethyl acetate, butyl acetate, isoamyl acetate,
etc
.
Hydrocarbons
Toluene, xylene, cyclohexane,
etc
.
Halogenated hydrocarbons
Trichloroethylene, trichloroethane, methyl chloride, carbon tetrachloride,
etc
.
Other
s
Hydrogen peroxide, etc.
Functional Electronic Wet Chemicals
EtchantsMetal etchant, buffered oxide etchant, ITO etchant, silicon etchant,
etc
.
Goto Boraychem to know more.
Cleaning liquids
Cleaning solution after copper polishing, cleaning solution after etching of aluminum process, cleaning solution after etching of copper process, cleaning solution after removing HKMG false gate, cleaning solution for removing flash
.
Photoresist supporting reagentsDiluent
s
Propylene glycol methyl ether acetate, propylene glycol methyl ether, ethyl lactate.
Developer
s
Positive film developer, negative film developer,
etc
.
Stripping Solutions
Positive film stripping solution, negative film stripping solution, stripping cleaning solution, acidic stripping solution,
etc
.
Applications of Electronic Wet Chemicals
There are three major application areas of electronic wet chemicals, i.e., the panel display manufacturing process, the semiconductor manufacturing process, and the solar panel manufacturing process. Specific application links and related technical requirements for electronic wet chemicals in different fields are compared as follows:
Technical requirements for electronic wet chemicals
Panel display manufacturing process
Mainly used in thin film process cleaning, photolithography, development, etching and other links.
Highest technical requirements
Semiconductor manufacturing process
Mainly used in the front-end wafer manufacturing of integrated circuits and the back-end packaging and testing links.
High technical requirements
Solar panel manufacturing process
Mainly used for cleaning alkali production, diffusion to P-N junction, cleaning, etching and other links
.
Relatively low technical requirements
Functional electronic wet chemicals refer to the compound chemicals that achieve special functions and meet the special process needs in the manufacturing through compounded technology. They simply mean adding water, organic solvents, chelating agents, and surfactants on the basis of a single ultra-clean high-purity reagent (or the mixture of multiple ultra-clean high-purity reagents). The demand for functional electronic wet chemicals is increasing with the development of semiconductor manufacturing. Alfa Chemistry provides customers high quality functional electronic wet chemicals and can also be customized to your requirements.
Functional electronic wet chemicals are indispensable basic chemical materials for developing, cleaning and etching process of semiconductor manufacturing. They are mainly applied in integrated circuit manufacturing, flat panel display manufacturing and photovoltaic cell manufacturing.
The application of functional electronic wet chemicals in integrated circuit manufacturing mainly refers to wafer processing, including the pre-treatment of silicon wafers before wafer processing and backend packaging and testing. The wafer processing is very complex, which can be divided into lithography, etching, oxidation, thin film, chemical mechanical polishing grinding (CMP), diffusion (DIFF) and other parts. Lithography, etching, oxidation and surface pretreatment processes all require functional electronic wet chemicals.
Functional electronic wet chemicals are mainly used in the development, lithography (etching-peeling) and cleaning processes of array process in flat panel display manufacturing. The array process for flat panel display manufacturing is similar to wafer processing, except that array fabricates thin-film transistors on glass instead of silicon wafers. Functional electronic wet chemicals are key basic materials in flat panel display manufacturing. The cleaning of particles and organic matter on the substrate, the development and removal of photoresists, and the etching of circuit require functional electronic wet chemicals.
The main process of photovoltaic cell manufacturing include texturing, P-N junction preparation, aluminum backplane preparation, front and back metal contact, and anti-reflection layer deposition. Functional electronic wet chemicals are mainly used in the texturing, cleaning and etching of photovoltaic cell manufacturing. The amount of functional electronic wet chemicals used in the texturing processing part accounts for 60%-70% of the total consumption.
With the improvement of electronic components manufacturing requirements, the requirement for functional electronic wet chemicals in related industries are also increasing. In order to standardize the world&#;s ultra-clean and high-purity reagents, the International Semiconductor Equipment and Materials Organization classifies functional electronic wet chemicals into five grades (G1-G5). The photovoltaic field generally only requires G1 level. The flat panel display field generally requires G2 and G3 levels. The grade requirement of functional electronic wet chemicals used in integrated circuits is relatively high, which is G3, G4 and G5 levels. The purity requirement of functional wet electronic chemicals used in discrete devices is lower than that of integrated circuits, which is basically concentrated in G2 level.
Alfa Chemistry has been supplied functional electronic wet chemicals to our customers for many years. We pride ourselves to count the world's leading integrated circuit manufacturers and flat panel display manufacturers among our customers. Alfa Chemistry provides a wide range of functional electronic wet chemicals and can also be customized to your requirements, you can click the button below to learn more. We also offer related technical advices and services, please don't hesitate to contact us if you are in need of assistance.
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