Published On : October 2026
A reader trying to understand where plasma ashing demand comes from by listing device technologies alone will miss the pattern, because demand follows the process step far more closely than it follows the device being made.
Within the global plasma ashing equipment market, the same small set of steps, removing photoresist after patterning, cleaning residues after etch and preparing surfaces in packaging, recurs across almost every device technology, so a technology's demand for ashing depends on how many such steps its process flow contains.
This page describes eleven process application categories and eight semiconductor technology categories strictly as market segments, and it makes no claim about process outcome, device performance or yield for any product or company.
The eleven process applications are photoresist removal, dry resist stripping, residue removal, polymer removal, wafer surface cleaning, die cleaning, flip chip cleaning, through-silicon via (TSV) cleaning, fan-out wafer level packaging cleaning, post-etch cleaning and surface activation.
The eight technologies are silicon devices, micro-electromechanical systems (MEMS), complementary metal-oxide-semiconductor (CMOS) sensors, RF devices, power devices, gallium nitride (GaN), silicon carbide (SiC) and compound semiconductors.
A logic or memory line patterns many layers, and each patterned layer typically needs resist removed afterwards, so demand scales with layer count rather than with the label on the finished chip.
A power device line has fewer layers but different materials, and the process step still recurs in the same way, which is why a technology with a short process flow can still be a meaningful source of demand if wafer volumes are large.
For equipment suppliers, tracking the process step rather than the device technology explains why demand reaches them from customers who would never be grouped together by end product.
For buyers, it explains why a tool qualified for one technology is often considered for another, since the underlying process step is the same even where materials differ.
Photoresist removal, dry resist stripping and post-etch cleaning are the three application categories most directly tied to the patterning sequence in front-end manufacturing.
Photoresist is the light-sensitive layer used to define a pattern, and once the pattern has been transferred into the underlying material by etch or implantation, the resist has to be removed completely before the next process step.
Dry resist stripping is the plasma-based approach to that removal, and it sits alongside wet chemical stripping as one of the two broad ways a fab can clear resist.
Post-etch cleaning addresses what the etch step leaves behind, including residues and modified resist surfaces, and it frequently follows resist removal in the same process flow.
These three categories overlap in practice, since one tool run can remove resist and clear post-etch residue in a continuous sequence, and the report separates them because buyers and suppliers describe them as distinct needs.
Because every patterned layer repeats the sequence, these categories are the most widely distributed source of demand across the semiconductor technologies in the report.
For buyers, the practical question is whether a process flow handles resist removal by dry stripping, wet stripping or a combination, since the answer decides how much dedicated ashing capacity a line needs.
For suppliers, the wet strip alternative is a standing competitive factor, and the full report treats the balance between dry and wet approaches as part of its restraint analysis.
This page does not compare how thoroughly any approach removes resist or residue, since that is a process performance matter outside the scope of this overview.
Residue removal, polymer removal and wafer surface cleaning describe the cleaning applications that extend beyond resist itself, and together they widen the range of steps where a plasma tool is considered.
Residue removal addresses material left on a wafer after processing, and polymer removal addresses the polymeric by-products that etch chemistries can deposit on feature sidewalls and surfaces.
Wafer surface cleaning is the broadest of the three, covering the removal of organic contamination from a wafer surface before a subsequent process step such as deposition or bonding.
What these categories share is that the material to be removed is not the patterned resist layer, which makes them a distinct source of demand even in a line whose resist removal is already handled elsewhere.
The categories also link equipment choice to the preceding process, since the residue a given etch leaves determines what the cleaning step has to address, and fabs therefore treat the pair as a combined design question.
For buyers, the main consideration is how many separate cleaning steps a process flow contains and whether one tool configuration can serve several of them.
The tools used for these steps are described in the discussion of plasma ashing equipment types, where the choice between batch and single-wafer formats and between plasma delivery approaches is set out.
For suppliers, these cleaning categories represent steps that can be sold alongside resist removal on the same platform, which widens the range of process needs one tool installation can address.
The categories are described here as market segments only, without any statement about how effectively a tool clears a particular residue.
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MARKET SHIFT Cleaning steps outside resist removal give the same tool more ways to be used across a process flow, which is one reason a platform's range of applications matters to buyers alongside its core ashing function. |
Die cleaning, flip chip cleaning, through-silicon via cleaning and fan-out wafer level packaging cleaning make up the advanced packaging group of applications, and they carry plasma processing beyond the front-end fab.
Advanced packaging assembles chips into dense multi-die or stacked structures, and several of its steps benefit from clean surfaces so that bonds, interconnects and moulding materials adhere properly.
Through-silicon vias are vertical connections passing through a silicon die or wafer, and cleaning them is a distinct step from the surface cleaning used on a flat wafer.
Fan-out wafer level packaging redistributes connections beyond the footprint of the die, and it involves reconstituted wafers or panels that make its cleaning needs different from those of a conventional wafer.
Die cleaning and flip chip cleaning address the preparation of individual dies and of dies with solder bump connections before attachment, which are steps carried out by packaging and assembly operations rather than in a wafer fab.
This group matters commercially because it broadens who buys plasma equipment, adding outsourced assembly and test companies alongside integrated device manufacturers and foundries.
For buyers, packaging lines often run mixed formats, including panels, which ties these applications to the wafer size categories described in the overview of equipment types.
For suppliers, the packaging group offers a route into plasma processing for companies whose strength lies in packaging process equipment rather than front-end etch and strip.
The report treats these as growth-oriented applications within its driver analysis, while this page confines itself to describing what each step is.
Surface activation is the eleventh application category, and it differs from every other category in the group because it adds a property to a surface instead of removing material from it.
In surface activation, a plasma treatment changes the surface chemistry of a material so that it bonds or wets better, which prepares it for a later step such as adhesive bonding, encapsulation or underfill.
Its place in the list reflects how a tool built for ashing is frequently used for a closely related plasma treatment, even though the purpose is different.
The demand for surface activation sits mainly in packaging and assembly, and in certain MEMS and sensor steps where bonded structures are assembled.
For buyers, it means a plasma tool purchased for removal steps may also be able to cover activation, which can reduce the number of separate systems a facility needs.
For suppliers, activation gives a platform an additional use that can support its utilisation across a customer's mix of products.
The category is described only as a market segment, and this page makes no claim about how strongly any treatment improves adhesion or bond reliability.
Silicon devices, MEMS, CMOS sensors and RF devices make up the first four of the eight semiconductor technology categories, and they share a reliance on repeated patterning and cleaning steps.
Silicon devices cover the broad base of logic, memory and general-purpose chips, and they account for the largest number of patterned layers and therefore a wide spread of resist removal and post-etch cleaning steps.
MEMS devices combine mechanical and electronic structures on a chip, and their release and cleaning steps include operations on structures that are fragile or deeply etched.
CMOS sensors, which include image sensors, involve cleaning steps on optical and pixel structures where surface condition matters to the finished device.
RF devices cover the chips used in wireless communication, and they draw on silicon and compound semiconductor processes, so their demand overlaps with several other technology categories.
What links these four is that the process step defines the demand, since each uses resist patterning and etch to build its structures, and each therefore calls on the same family of tools.
For buyers, the technology determines the process window a tool must support, including the materials present and the sensitivity of structures on the wafer, even where the tool itself is a standard platform.
The customers behind these technologies are described in the overview of plasma ashing equipment customers, which shows how each technology maps onto integrated device manufacturers, foundries and others.
This page describes the four technologies only as market categories and does not state how any tool performs on any of them.
Power devices, gallium nitride, silicon carbide and compound semiconductors make up the remaining four technology categories, and they are the group where material differences matter most to process design.
Power devices switch and control electrical energy, and they are manufactured in silicon and increasingly in wide-bandgap materials, which broadens the range of materials a tool must handle.
Gallium nitride and silicon carbide are wide-bandgap compound materials used in power and RF devices, and their substrates and process flows differ from silicon, which affects how equipment is configured for them.
Compound semiconductors form the wider category covering materials other than silicon, and they are used in RF, optical and power applications.
The technology label matters here because process conditions, wafer formats and handling are often different from silicon, even though the underlying ashing and cleaning step is the same in kind.
These technologies also tend to run on smaller wafer sizes than leading-edge silicon, linking them back to the wafer size categories in the overview of equipment types.
For buyers, the technology decides which tools can be considered at all if substrate material, wafer diameter or handling differs from a standard silicon line.
For suppliers, these technologies are a route to differentiation, because a company willing to configure a platform for a specific material can serve customers that a general-purpose silicon platform does not suit.
The report treats the adoption of silicon carbide and gallium nitride devices as a demand driver, and this page limits itself to describing the technology categories.
Eleven process applications are tracked, from photoresist removal and post-etch cleaning to advanced packaging cleaning and surface activation, across eight technologies including silicon, MEMS, CMOS sensors, RF devices, power devices, GaN, SiC and compound semiconductors.
Plasma ashing is used mainly to remove photoresist and related residues after a patterning step, and the same family of tools is also used for cleaning and surface treatment steps in advanced packaging.
Yes. Die cleaning, flip chip cleaning, through-silicon via cleaning, fan-out wafer level packaging cleaning and surface activation are tracked as advanced packaging applications.
Dry resist stripping uses a plasma to remove resist, while wet stripping uses chemical solutions. Both are used in fabs, and the balance between them is a factor in plasma tool demand.
Resist removal, post-etch cleaning and packaging cleaning steps recur across nearly all technologies, so demand follows how many such steps a process flow contains rather than the type of device being made.