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Whether wafers, glass panels, IC substrates or precision components: material, surface and geometry define the requirements for cleaning, etching, rinsing and drying. exateq configures wet benches, substrate handling and chemical supply around your application.
FROM WAFERS TO COMPONENTS
The following substrate groups differ in chemical resistance, mechanical strength and surface structure. A process sequence must match the material and layer stack involved.
Silicon wafers
Silicon carbide (SiC)
Gallium nitride (GaN)
Gallium arsenide (GaAs)
Glass substrates
Quartz and fused silica
Sapphire wafers
IC substrates and printed circuit boards
Masks and patterned substrates
Precision parts and components
PV wafers and solar cell substrates
Specialty materials and formats
Silicon wafers underpin many semiconductor processes. Depending on the production step, priorities include particle removal, surface cleaning or defined etching processes. Layer stack, wafer thickness and surface condition affect process design.
For SiC wafers, surface cleanliness, existing layers and handling requirements must be considered together. Cleaning, rinsing and drying steps are matched to the relevant production stage.
GaN is often processed as a layer on a supporting substrate. Compatibility must therefore be considered for the complete layer system, including exposed contact and carrier materials.
For GaAs, process chemistry, exhaust and separate collection of resulting media need to be addressed early. Equipment design depends on the application, layer stack and site safety concept.
Glass panels and patterned glass substrates require cleaning across the surface and gentle handling. Glass type, coating, dimensions and permissible surface changes determine the appropriate treatment.
Quartz and fused silica substrates are treated according to their surface, geometry and coating. Process selection focuses on chemical compatibility and avoiding unintended surface attack.
For sapphire substrates, the cleaning objective must suit existing surface structures. Suitable carriers and defined contact points support reproducible handling during rinsing and drying.
For organic or inorganic IC substrates and printed circuit boards, metallisations, dielectrics and structures must be assessed together. Panels and larger formats require suitable fixtures and transport paths.
Sensitive structures and coatings require tailored cleaning conditions. Process forces, contact areas and final drying are designed around the loads the substrate can tolerate.
Metal, ceramic and polymer components have different geometries and contamination profiles. Baskets, fixtures and process control are matched to accessibility, rinsing requirements and chemical carryover.
For PV wafers, cleaning, texturing and other application-specific wet processes are relevant. Thin substrates require gentle handling, while batch size and process sequence must suit the intended throughput.
Multilayer systems, coated substrates and unusual geometries require individual assessment. Drawings, material data, layer-stack details and the desired process result help guide an initial discussion.
DESIGNING THE PROCESS AND EQUIPMENT TOGETHER
The material designation is a starting point. A sound equipment design also requires the process objective, layer details, dimensions and production conditions.
Consider the base material, coatings, contact metals and all surfaces exposed to chemicals.
Define dimensions, thickness, weight, breakage risk and permissible contact areas.
Agree cleaning or etching objectives, media, temperatures and rinsing and drying requirements.
Align batch size, cycle time, automation level, chemical supply and waste collection.
| Solution | Role in the process |
|---|---|
| Manual wet benches → | Flexible operation in laboratories, development and production, with application-specific tanks and substrate fixtures. |
| Automatic wet benches → | Defined process sequences and automated substrate transport for recurring batch processes. |
| Fume hoods → | Exhausted work areas for manual chemical handling, equipped for the task and protection concept. |
| Chemical supply & waste collection → | Supply and separate collection of process media to suit the process chemistry. |
| Wafer carriers & substrate holders → | Fixtures designed for substrate dimensions, material, contact areas and automation interfaces. |
| Drying systems → | Drying after wet processes, matched to geometry and surface requirements. |
Silicon, glass or ceramics describe the workpiece being processed. PP, PVDF, conductive polymers or stainless steel may be equipment construction materials. Both choices are linked through process chemistry, but address different questions.
Read the article: Choosing the right material for wet benches →This may be possible if process chemistry, contamination requirements, substrate holders and the safety concept are compatible. Incompatible media or demanding purity requirements may require separate process areas.
Suitability depends on the entire layer stack. Coatings, contact metals and exposed structures need to be assessed alongside the base substrate for the intended treatment.
Useful information includes material and layer stack, dimensions, thickness, required processes, chemicals and temperatures, batch size, throughput target and cleanliness requirements. Drawings or samples can support the discussion.
Suitability is assessed through substrate support, movement profiles and the loads in each process step. Contact points, carriers, transport and drying are considered together.
Talk to exateq about your material, process objective and throughput. Together we can define the requirements for the wet bench, handling and chemical supply.
Discuss your substrate and application