Lithium batteries and semiconductors are two of the fastest-growing markets for industrial vacuum technology, and vacuum pump suppliers are often asked the same question by buyers from both sectors: where exactly are vacuum pumps used, and what changes between one industry and the other? The short answer is that both industries depend on vacuum at almost every critical production step, but the vacuum levels, the gases being pumped, and the tolerance for contamination are fundamentally different. Those differences decide which pump technology belongs on the factory floor.
This article walks through the main vacuum pump applications in each industry, then puts the two side by side so that engineers and purchasing teams can match the right pump to the right process.
Vacuum pump applications in lithium battery manufacturing
Battery cell production is, at its core, a battle against moisture and trapped gas. Even small amounts of residual water or air pockets inside a cell will hurt capacity, cycle life, and safety, so vacuum is applied repeatedly from slurry preparation to final assembly. The main application points are:
- Slurry mixing and degassing. Cathode and anode slurries are mixed under vacuum so that entrained air bubbles are pulled out before coating. Bubbles left in the slurry translate directly into coating defects and weak spots on the electrode.
- Electrode drying. After coating, electrode sheets pass through vacuum drying ovens where residual solvent, typically NMP on the cathode side, and trace moisture are evaporated at reduced pressure. Lowering the pressure drops the boiling point of the solvent, so drying happens faster and at gentler temperatures that protect heat-sensitive binder materials. Moisture at this stage is controlled down to very low ppm levels.
- Electrolyte degassing and filling. Electrolyte is degassed under vacuum before use, and the filling step itself is carried out under vacuum so the liquid is drawn deep into the porous structure of the separator and electrodes. Trapped gas at this stage means incomplete wetting and, later, lithium plating and premature cell failure.
- Formation, standing, and leak detection. Vacuum assists in gas removal during the formation cycles, and vacuum-based helium leak detection verifies the hermetic sealing of finished cells.
The working conditions here are demanding in a specific way: the vacuum range is mostly rough to medium vacuum, but the pumps swallow large volumes of solvent vapor and fine electrode dust, often in continuous 24-hour drying shifts. Oil-sealed pumps struggle because solvent condenses in the oil and degrades it quickly. That is why battery plants have largely standardized on dry pump technology that tolerates vapor without contamination or rapid wear.
Vacuum pump applications in semiconductor manufacturing
Semiconductor fabs use vacuum for a different reason. The goal is not only to remove unwanted gas but to create an ultra-clean, precisely controlled space where atoms can be added to or removed from a wafer with nanometer accuracy. A single particle or a trace of hydrocarbon vapor can scrap an entire wafer, so the pump itself must never be a source of contamination. Key application points include:
- Load locks and wafer transfer. Every time a wafer moves between atmosphere and a process chamber, the load lock is pumped down rapidly to keep the process environment isolated and clean.
- Photolithography. Advanced EUV lithography operates in a high vacuum environment because EUV light is absorbed by almost any gas; the optical path must be kept nearly empty and perfectly clean.
- Etching and deposition (CVD, PVD, ALD). Plasma etch and the various chemical and physical vapor deposition processes run at stable medium-to-high vacuum levels. Pressure stability directly controls film thickness, uniformity, and etch profiles, so the pumping system must hold the setpoint without fluctuation while handling corrosive and reactive process gases.
- Ion implantation. The ion beam that dopes the silicon travels through a high vacuum column; any residual gas would scatter the ions and ruin dose precision.
Compared with battery production, the vacuum levels here are far deeper, stretching from medium vacuum down to 10-7 mbar in the most advanced tools, and the gas streams are chemically aggressive. The pump stack is therefore more complex: a dry pump handles the process gases at the chamber exhaust, a Roots vacuum pump boosts pumping speed in the mid-range, and a turbo pump takes over when the process demands high or ultra-high vacuum.
Lithium battery vs semiconductor: the key differences
Putting the two industries side by side makes the selection logic much clearer:
| Aspect | Lithium battery production | Semiconductor fabrication |
|---|---|---|
| Typical vacuum range | Rough to medium vacuum, from atmosphere down to the 1 Pa range | Medium to ultra-high vacuum, down to 10-7 mbar |
| Main purpose of vacuum | Remove moisture, solvents, and trapped gas | Create a clean, stable environment for atomic-scale processing |
| Process media | Solvent vapors such as NMP, plus fine dust | Corrosive and reactive gases, byproduct powders |
| Contamination sensitivity | High: moisture and oil vapor damage cells | Extreme: a single particle can kill a chip |
| Typical pump configuration | Dry screw pumps, often with Roots boosters on drying ovens | Dry pumps backed by Roots pumps and turbo molecular pumps |
| Operating pattern | Long, steady cycles on mixing and drying equipment | Continuous fab operation with fast, repeated pump-down cycles |
One conclusion stands out from the comparison: despite all their differences, both industries are moving away from oil-sealed technology for their critical steps, because oil backstreaming and oil degradation are unacceptable in a battery cell and unthinkable in a wafer fab.
Choosing the right pump technology for each process
For lithium battery lines, the practical choice is a dry screw vacuum pump sized for the vapor load of the drying ovens, paired with Roots boosters where faster pump-down is needed. The screw mechanism tolerates solvent vapor without oil contamination, keeps maintenance intervals long, and avoids the frequent oil changes that make sealed pumps uneconomical in this duty. For semiconductor tools, the dry pump becomes the foundation of a multi-stage stack, with Roots blowers adding mid-range speed and turbo molecular pumps delivering the deep vacuum that lithography and implantation demand.
InPowerVac (Zhejiang Yingpa Electromechanical Co., Ltd) manufactures the full chain of equipment mentioned above: dry screw vacuum pumps produced on 32 Mazak machining centers, Roots vacuum pumps in air-cooled and gas-circulation-cooled configurations, turbo pump systems reaching 10-7 mbar, and complete customized vacuum units. The company has supplied vacuum equipment to manufacturers such as Foxconn, Huawei, and Samsung, and its engineering team regularly configures pump packages for both battery gigafactories and semiconductor-related processes. If you are specifying vacuum equipment for either industry, contact InPowerVac with your process parameters, and the team will recommend a pump configuration matched to your vacuum range, gas load, and cleanliness requirements.
