Zero Waste Logo The Zero Wate Network the University of Texas at Arlington Center for Environmental Excellence Environmental Training Institute Logo  

Join Us on:

Social Network Nav Bar

Lean and P2 Workshops

Seattle, WA
10/28/14 - 10/30/14

Arlington, TX
11/04/14 - 11/06/14

Houston, TX
11/18/14 - 11/20/14

 

More...

 

Environmental Management Systems Workshops

Little Rock, AR
10/14/14 - 10/17/14

Arlington, TX
03/03/15 - 03/06/15

Houston, TX
04/07/15 - 04/10/15

Albuquerque, NM
05/12/15 - 05/15/15

 

More...

Case Study Database

           Add Story    |    Search Case Studies    |   

 

Sony Microelectronics

Year Submitted: 2003

Process: Circuit Board Cleaning

Industry: Electronics Manufacturing

Wastes Reduced: VOC Emissions

Equipment: Covered Tanks

Location: San Antonio TX

No. of employees: 800

Contact: Jim Gonzales

Phone: (210) 647-6320



Description:

The objective of the project was to significantly reduce VOC emissions of our ACT I photoresist stripper solution and also to reduce the total volume of ACT I solution used in Fab 2A's wafer processing operation. The ACT I solution historically has been one of the larger contributors to Fab 2A's VOC emissions. The solution is volatile and therefore evaporations losses are significant. The ACT I solution is used in wet baths in various production areas to remove photoresists and to clean product wafers.

P2 Application:

In January 1993 the first wet hood was upgraded with specially designed covered tanks that reduced evaporation losses. At the beginning of April 1993 three (3) additional sinks were also upgraded so that the total Sony Fab 2A emission of ACT I VOCs could be reduced by approximately 88%. Also at the beginning of April improved chemical changeout procedures were implemented. Extensive studies were completed that confirmed that by using an alternating clean / dirty bath procedure the ACT I bath life could in effect be extended from 15 lots to 50 lots. This improved changeout procedure resulted in approximately a 30% reduction in chemical usage and a $45,000 annual cost savings.

Environmental Benefits:

ACT I VOC emissions were reduced by 88% (approximately 14,000 lbs/yr.) and total chemical usage was reduced by approximately 66% (40,000 lbs/yr.). Excellent performance by all resulted in goals of the project being exceeded in a very timely manner.

Details of Reductions

Additional Information :

project was approximately $70,000. Pay back for the project was six months.

Source: TCEQ



SHEP Shield
Safety
Health and
Environmental
Professional



ERP Shield
Environmental
Regulatory
Professional



ESP Shield
Environmental
Science
Professional



EMP Shield
Environmental
Management
Professional

Attend a workshop and
earn credits toward a
Professional Certification

 

 



The Zero Waste Network is one of eight Pollution Prevention Resource Exchange P2RxCenters , serving as a national network of regional information centers: NEWMOA (Northeast), WRRC (Southeast), GLRPPR (Great Lakes), ZeroWasteNet (Southwest), P2RIC (Plains), Peaks to Prairies (Mountain), WSPPN (Pacific Southwest), PPRC (Northwest). We are a proud member of the National Pollution Prevention Roundtable.

National P2 Roundtable Logo