CIRCUPOSIT Neutralizer 3313 For PWB Metallization Applications

Transcription

1 CIRCUPOSIT Neutralizer 3313 For PWB Metallization Applications Regional Product Availability Description N. American Asia CIRCUPOSIT Neutralizer 3313 has been developed as a replacement for the Sulfuric-Peroxide Pre-Dip in the CIRCUPOSIT 300 PTH Process. CIRCUPOSIT Neutralizer 3313 effectively removes manganese residues and enhances coverage on holewall surfaces. CIRCUPOSIT Neutralizer 3313 can be used with CIRCUPOSIT Glass Etch Additive to offers controlled texturing or removal of protuding glass fibers. Advantages Fast and effective neutralization Promotes excellent electroless coverage Clean, adjustable glass etching Contains no hydrochloric acid Simple controls Two liquid components Free rinsing Bath Make-Up Add in order listed, stirring well between additions. Distilled or deionized (D.I.) water: 60% bv CIRCUPOSIT Neutralizer 3313: 33% bv CIRCUPOSIT MLB Glass Etch Additive: 0 3% bv* Distilled or D.I. water to volume *See Bath Control section for appropriate concentration. Bath Operations Temperature: C ( F) Time: 4 6 minutes Agitation: Mild mechanical agitation is recommended Rinsing: Counterflow rinses as required Ventilation: Recommended, especially when operated as a glass etchant Filtration: Use a 5 10 micron polypropylene cartridge as required Bath Control And Replenishment The made-up bath is analyzed independently for neutralizer bath strength and glass etchant strength (i.e., fluoride level). The bath is then replenished with either CIRCUPOSIT Neutralizer 3313 or CIRCUPOSIT Glass Etch Additive, respectively. Neutralizer bath strength should be maintained in the range of %. A replenishment schedule for CIRCUPOSIT Neutralizer 3313 is given below. Page 1 of 5

2 Replenishment Schedules Replenishment Schedule for 100 liter bath Metric % Neutralizer Bath Strength CIRCUPOSIT Neutralizer 3313 Addition liters liters liters liters Replenishment Schedule for 100 gallon bath U.S. % Neutralizer Bath Strength CIRCUPOSIT Neutralizer 3313 Addition gallons gallons gallons gallons The degree of glass etch achieved is controlled by varying the amount of CIRCUPOSIT MLB Glass Etch Additive present. A typical range is moles/liter fluoride (1 3% of bath volume). The lower end of this range is suitable for desmear operations. The chart shown below gives approximate glass etch rates as a function of Glass Etch Additive concentration. The upper concentration is suited to true etchback applications. The product may also be operated with no MLB Glass Etch Additive as a stand alone neutralizer. 2 Glass Removal vs. Glass Etch Additive Content Mils Removed % CIRCUPOSIT TM Glass Etch MLB Etch Additive 5 min., 50 C (120 F) Best results are obtained when the fluoride concentration is maintained within 0.5% of the level selected. Page 2 of 5

3 Neutralizer Bath Strength Glass Etchant Analytical Procedure Analytical Procedure I. Principle A sample is titrated with sodium hydroxide to an Ethyl Red end point. II. Reagents a) Sodium hydroxide, 1.00N, standardized b) Ethyl red indicator, 0.1% in 1:1 methanol and distilled water III. Procedure a) Pipette 10.0 ml CIRCUPOSIT Neutralizer 3313 bath into a 250 ml Erlenmeyer flask and dilute with 25 ml distilled water. b) Add approximately 1 ml of ethyl red indicator. c) Titrate with 1.00N NaOH to a yellow end point. IV. Calculation % Neutralizer Bath Strength = ml NaOH N of NaOH (1.00) 100% aliquot (10 ml) I. Principle Fluoride concentration is determined using an ion-specific electrode. II. Equipment a) A fluoride ion specific electrode (e.g. Orion Model or ) and reference b) A specific ion meter or ph/mv meter capable of 1.0 mv accuracy III. Procedure a) Calibrate the meter prior to use with standards which bracket the chosen fluoride concentration (0.5% and 3.0% GEA are convenient values). b) Prepare standards on a weekly basis. Standards are carefully prepared made-up baths with differing amounts of CIRCUPOSIT MLB Glass Etch Additive. Prepare a 0.5% standard with 33.0 ml CIRCUPOSIT Neutralizer 3313, 0.5 ml MLB Glass Etch Additive and distilled water to 100 ml. Prepare a 3.0% standard with 33.0 ml CIRCUPOSIT Neutralizer 3313, 3.0 ml MLB Glass Etch Additive and distilled water to 100 ml. c) Prepare a calibration curve by plotting millivolts vs. the log 10 of the concentration of the two standards. d) Analyze the working bath by first ensuring that bath normality is between 0.95 and Draw a small sample of bath, allow to cool to room temperature, immerse the probe in the cooled solution and read concentration directly from meter or from calibration curve. Yield Yield Replenishment Etch Back Desmear Neutralizer Neutralizer m 2 /L (550 ft 2 /gal.) MLB Glass Etch Additive 49.1 m 2 /L (2,000 ft 2 /gal.) 27.0 m 2 /L (1,100 ft 2 /gal.) 98.2 m 2 /L (4,000 ft 2 /gal.) 36.8 m 2 /L (1,500 ft 2 /gal.) Page 3 of 5

4 When used in true etchback applications, 7.4 square meters can be processed per liter (300 ft 2 /gal.) of bath with no loss in functionality. When used in desmear applications, or as a stand alone neutralizer, bath life is in excess of 14.7 square meters per liter (600 ft 2 /gal.) of made-up bath. Product Data CIRCUPOSIT Neutralizer 3313 Description: ph: <1 Specific 20 C: ~1.2 Total Acid Normality: ~5 Pale-yellow-amber, non-flammable, strongly- acidic aqueous solution CIRCUPOSIT MLB Glass Etch Additive Description: Water-white, moderately- acidic fluoride solution Total Fluoride Content: ~10 Molar Equipment Tanks: PVC, polypropylene Heaters: Teflon fluoropolymer or Teflon fluoropolymer-coated Filter Media: Polypropylene Page 4 of 5

5 Handling Precautions Before using this product, or the analytical reagents required for this control, consult the Material Safety Data Sheet (MSDS)/Safety Data Sheet (SDS) for details on material hazards, recommended handling precautions and product storage. CAUTION! Keep combustible and/or flammable products and their vapors away from heat, sparks, flames and other sources of ignition including static discharge. Processing or operating at temperatures near or above product flashpoint may pose a fire hazard. Use appropriate grounding and bonding techniques to manage static discharge hazards. CAUTION! Failure to maintain proper volume level when using immersion heaters can expose tank and solution to excessive heat resulting in a possible combustion hazard, particularly when plastic tanks are used. Storage Disposal Considerations Store products in tightly closed original containers at temperatures recommended on the product label. Dispose in accordance with all local, state (provincial) and federal regulations. Empty containers may contain hazardous residues. This material and its container must be disposed in a safe and legal manner. It is the user's responsibility to verify that treatment and disposal procedures comply with local, state (provincial) and federal regulations. Contact your Dow Electronic Materials Technical Representative for more information. Product Stewardship Customer Notice Dow has a fundamental concern for all who make, distribute, and use its products, and for the environment in which we live. This concern is the basis for our product stewardship philosophy by which we assess the safety, health, and environmental information on our products and then take approp riate steps to protect employee and public health and our environment. The success of our product stewardship program rests with each and every individual involved with Dow products - from the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product. Dow strongly encourages its customers to review both their manufacturing processes and their applications of Dow products from the standpoint of human health and environmental quality to ensure that Dow products are not used in ways for which they are not intended or tested. Dow personnel are available to answer your questions and to provide reasonable technical support. Dow product literature, including safety data sheets, should be consulted prior to use of Dow products. Current safety data sheets are available from Dow. For Industrial Use Only. This information is based on our experience and is, to the best of our knowledge, true and accurate. However, since conditions for use and handling of products are beyond our control, we make no guarantee or warranty, expressed or implied, regarding the information, the use, handling, storage or possession of the products, or the applications of any process described herein or the results sought to be obtained. Nothing herein shall be construed as a recommendation to use any product in violation of any patent rights. Contact: North America: Japan: (+81) Asia: (+852) Europe: (+41) Notice: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document. References to Dow or the Company mean the Dow legal entity selling the products to Customer unless otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. Page 5 of 5