Semiconductor Industry - Case Studies

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Ammonia Bearing Wastewater Treatment for Semiconductor Firm

Siemens Water Technologies develops effective recycle/reuse system for hydrofluoric acid wastewater for microelectronics

BP Solar Meets Expansion Needs, Reduces Operating And Maintenance Costs With CDI-LX™ High-Purity Water System

BP Solar’s Frederick, MD plant was undergoing rapid expansion and needed to upgrade their existing reverse osmosis / service deionization water system to handle higher production needs. They were using approximately 20 DI tanks a week to keep up with the demand for water. The system required considerable maintenance, as well as acid and caustic chemicals.

Copper CMP/CMP Wastewater Treatment – A Classical Method with a Recycling Twist

Siemens Water Technologies was approached by a semiconductor tool manufacturer based in Silicon Valley to assist in the design of an automated CMP and copper CMP waste treatment system. After careful economic evaluations, it became clear that the largest cost of ownership of the treatment system was the removal of the hazardous waste sludge from a classical two stage precipitation/clarification system.

Customer Looks to Siemens Water Technologies for Operation of UPW and Wastewater Treatment Systems

This customer wanted to change the UPW and wastewater operations provider from its current provider to Siemens Water Technologies without negatively impacting production. Siemens assembled an interim staff by utilizing experienced technicians from other locations until a permanent staff was in place.

Gasket Upgrade Means an Upgrade in Water Quality

A very large Japanese-based semiconductor fabricator (fab) located in the US introduced a new product consisting of Flash memory with a smaller geometry. The customer’s upgrade in technology called for an upgrade in water treatment. The previous memory technology used water treatment equipment provided by Siemens Water Technologies, formerly USFilter.

Hydrofluoric Acid Wastewater Recycling Systems

A polysilicon manufacturer in the Midwest required a final hydrogen peroxide/hydrofluoric acid wash followed by a 50-gallon per minute rinse. The process was to be continuous 24 hour per day during production runs. The facility was unable to obtain an industrial wastewater discharge permit to the local POTW and was faced with the alternative of trucking the rinse wastewater 2-3 hours to a treatment facility.

Microelectronic Customers Benefit from MEG PPQ Resin

Customers needed an economic resin change out with a short rinse up requirement to below detection levels on ionic constituents and with TOC levels below feed levels. With the requirements for maximum uptime and low risk on putting new resins on-line, Siemens upgraded its MEG resins.

Northwest Fab Relies on Siemens to Provide Creative Space Planning for UPW System

This Northwest Fab had space limitations when looking at upgrading its UPW system. Siemens Water Technologies was requested to increase makeup and polishing supply flows to utilize the same limited space without the need of an additional building. Minimizing costs and increasing reliability of the system were additional considerations.

Printed Circuit Board Rinsewater Recycled to Overcome Water Shortage and Reduce Wastewater Discharge

West Coast printed circuit manfacturer contacted Siemens becasue regional drought situations had them consider the potential for reuse of their washwater in the face of their facilities' water shortage. West Coast printed circuit manfacturer contacted Siemens becasue regional drought situations had them consider the potential for reuse of their washwater in the face of their facilities' water shortage. The printed circuit boards require a final wash step to remove flux and other impurities such as surfactants, copper, lead and tin. Prior to discharge, or in this case reuse, the contaminated rinsewater needs to be treated for effective removal of the metals and to meet the company's makeup water requirements.

Reject Ultrafiltration System Provides Cost Savings for Southwest Fab

Increased demand led this fab to look for methods to increase available water for consumption while minimizing initial capital cost and floor space. The system consisted of a makeup system utilizing triple pass RO, UV, degasification, mixed beds, etc. Expanding this equipment to allow for more water availability in the loop would require a noticeable increase in the capital and operating costs, and consume a distinct amount of floor space that was not readily available.

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Semiconductor - Case Studies

Semiconductor Industry - Case Studies