techni gold 25 es data sheet

Technical Data [email protected] www.technic.com

391428 Rev 0214

TECHNI GOLD 25 ES TECHNI GOLD 25 ES is a neutral non-cyanide gold plating formulation suitable for electronics, semiconductor, wafer, electroforming, or general applications. Without additives, the solution yields soft, bright-to-satin-bright deposits meeting the requirements of Type III A of MIL-G-45204 C (ASTM B488-95 as revised). EQUIPMENT/MATERIALS OF CONSTRUCTION Tanks: Temperature stabilized natural Polypropylene, Polyethylene, rigid PVC, Koroseal

lined steel with Plastisol coated exterior or other materials that will not contaminate the plating solution.

Anodes: Platinized Titanium or Columbium. Anodes are available coated single or double

sided in thicknesses of 125 and 250 microinches. Contact your Technic representative for assistance in selecting the appropriate anode for your application.

Anode Bags: Not required. Heaters: Titanium, low density, Silica Sheathed, Teflon Coated or PVDF-clad panel

heaters with thermostatic control. Filtration: Continuous, using leached 1 5 micron (1 micron preferable) woven

polypropylene filter cartridges with a flow rate of three (3) five (5) times the tank volume/hour.

EQUIPMENT PREPARATION Tanks: Prior to makeup, the process tank and ancillary equipment should be thoroughly cleaned and then leached with a sulfuric acid solution. This procedure is particularly important for new equipment or equipment previously used for other processes.

TECHNI GOLD 25 ES Page 2

Metric U.S. Cleaning Solution Range Recommended Range Recommended Tri-Sodium Phosphate 22.5-67.5 g/l 45 g/l 3-9 oz/gal 6 oz/gal and/or Potassium Hydroxide 22.5-67.5 g/l 45 g/l 3-9 oz/gal 6 oz/gal

Leaching Solution Sulfuric Acid 100 ml/l 100 ml/l 10% v/v 10% v/v Leaching Procedure: Please follow the recommended leaching procedure below. DO NOT install the plating solution until the entire leaching procedure has been completed. NOTE: If the tank walls are heavily coated with materials which cannot be removed by scrubbing, a tank liner is recommended.

1. Remove the anodes and filters from the tank to be used. Dispose of filter cartridges and

anything else that may be contaminated with previous process chemicals. 2. Thoroughly wash down the tank and ancillary equipment with clean water. 3. Recirculate water throughout the complete system to remove water soluble materials.

4. Discard the recirculated water.

5. Add the cleaning solution to the tank and heat to 38 50 C (100 - 120 F). Recirculate

the solution throughout the tank and filter pumps for 4 - 8 hours.

6. Drain the cleaning solution and rinse the tank with clean DI water.

7. Fill the tank with clean DI water and recirculate throughout the tank and filter pumps.

8. Discard the rinse water.

9. Add the leaching solution and recirculate throughout the tank and filters pumps. Leave the leaching solution in the tank for a minimum of eight (8) hours.

10. Drain the leaching solution and rinse the tank with clean DI water.

11. Fill the tank with clean DI water and recirculate throughout the tank and filter pumps.

12. If the tank had previously been used for lead-containing processes, analyze for lead (Pb)

and bismuth (Bi) concentrations in the rinse water. If the concentration of either is greater than 5 ppm, discard the rinse water and repeat steps 9-12. If concentrations are both less than 5 ppm, proceed to next step.

13. Discard the rinse water.

14. Prepare the plating solution according to the recommended specifications.


SOLUTION MAKE-UP 1 liter 1 gallon Deionized (DI) water 150 ml 15% v/v Techni Gold 25 Make Up ES 580 ml 58% v/v TG-25E Stabilizer 5.3 g 0.7 oz TG-25E Buffer Salts 45 g 6.0 oz

TG-25 Concentrate 132 ml (=8.22 g/l) 13.2% v/v

(=1 tr. oz./gal) DI water Balance

NOTE: Techni Gold 25 ES can also be supplied as a ready-to-use solution (RTU). Contact your Technic representative for assistance.

MAKEUP PROCESS:

1. Fill tank with 150 ml/l (15% v/v) deionized or distilled water. Add required quantity of Techni Gold 25 Make Up ES and mix thoroughly.

2. Add TG-25E Stabilizer with agitation and allow to dissolve completely.

3. Add required amount of TG-25E Buffer Salts and allow to dissolve completely.

4. Check solution pH. If necessary adjust to pH 6.5-7.0 with Techni Gold 25 ES pH+ or Techni Gold 25 ES pH- as needed.

5. Add gold as TG-25 Concentrate. Mix thoroughly.

6. Adjust to final volume with deionized water. Continue mixing and raise to operating temperature. The solution is now ready for use.

OPERATING PARAMETERS Range Optimum Techni Gold 25 Make Up ES 560-600 ml/l 580 ml/l TG-25E Stabilizer 2-6 g/l 5 g/l TG-25E Buffer Salts 30-60 g/l 45 g/l Gold metal as TG-25 Concentrate 8.2-12.3 g/l 8.2 g/l pH 6.5-7.5 7-7.5 S.G. >10B >10B Temperature 49-71C 60C

Current density 0.1-0.8 ASD Dependent on application Anode to Cathode Ratio 1:1 minimum

Deposition Rate 122 mg/amp min @ 1.0 tr.oz./gal (8.2 g/l) gold metal


REPLENISHMENT: TG-25 Concentrate contains 2.0 tr. oz. (62.2 gm) of gold per liter. Add one troy ounce gold (=31.1 g or 500 ml) as TG-25 Concentrate every 4.2 ampere-hours. pH ADJUSTMENT: The pH of Techni Gold 25 ES may be raised if necessary with Techni Gold 25 ES pH+, or with a 20-40% solution of sodium hydroxide. The pH of Techni Gold 25 ES may be lowered if necessary with Techni Gold 25 ES pH-. SPECIFIC GRAVITY: The specific gravity of Techni Gold 25 ES tends to rise slowly in use. Depending on application, the solution can be used at specific gravities up to about 30 Baum. COMPONENT DESCRIPTIONS: TG-25E Additive A is an arsenic-containing additive that can be used to increase the overall deposit brightness without significant increase in deposit hardness or loss of current efficiency. Normal dosage levels are from about 5-30 parts per million. Addition of 10 grams TG-25E Additive A per gallon (2.6 g/l) of plating solution provides a concentration of 30 ppm arsenic. TG-25 Additive E is an organic brightening agent that can be used to increase both brightness and hardness of the deposit. Normal dosage is 5-10 milliliters per U.S. gallon (1.3-2.6 ml/l), in which range the Additive functions primarily as a brightener only. The brightness and uniformity of the deposit are best controlled by Hull cell. To increase the brightness, add Techni Gold Additive E (0.5-1.0 ml/l increments). If there is not a sufficient response, Additive A should be added in increments of 0.45g/l (5ppm As) until the desired brightness level is achieved. TG-25E Buffer Salts - The concentration of TG-25E Buffer Salts tends to decrease slowly over time (weeks to months). In order to maintain chemical stability of the solution, the concentration should be analyzed periodically and adjusted as necessary. An analytical method is attached. The nominal concentration of TG-25E Buffer Salts in the plating solution is 6 ounces per gallon (45 grams per liter). When adding TG-25E Buffer Salts to the bath it is useful to add 2-3 grams of TG-25E Stabilizer per ounce (28.3 g) of TG-25E Buffer Salts replenished. HANDLING PRECAUTIONS BEFORE HANDLING ANY CHEMICAL PRODUCTS, IT IS IMPORTANT TO READ THE APPROPRIATE MATERIAL SAFETY DATA SHEET. When handling chemicals, always wear the prescribed protective clothing as detailed in the appropriate Material Safety Data Sheet. In case of skin contact, flush affected area with copious amounts of cold, clean water for at least 10 minutes. In case of serious exposure, particularly for eyes, obtain medical attention. STORAGE Store all chemicals in upright, original containers away from direct sunlight and in a dry area at 10 32C. Keep container closed when not in use.


The technical statements, information and data contained herein are believed to be accurate and reliable; however, no warranties, express or implied, including warranties of merchantability or fitness for a particular purpose, are made regarding the products described. Since many variables and factors affect processing, application or use, it is recommended that you perform tests to determine the suitability of this product for your particular use. Any oral statements or advice concerning product selection or use do not constitute warranties. Delivered products are warranted to meet our standard specifications at the time of sale and all sales are subject to the TERMS AND CONDITIONS OF SALE reproduced on the reverse side of each invoice.

WASTE TREATMENT It is the users responsibility to verify that treatment procedures comply with federal, state, and local regulations. Working solutions should be diluted, neutralized and disposed of in accordance with local and federal regulations. Consult your local agencies for recommendations for your area. Consult your Technic representative for further information. ORDERING INFORMATION Contact your local Technic company to order products and/or Material Safety Data Sheets:

Product Code Product Name

Liquid Solid

or Salt Application

391428 Techni Gold 25 Make Up ES Liquid For Makeup and Replenishment

390204 TG-25E Stabilizer Salt For Makeup and Replenishment

391327 TG-25 Concentrate Liquid For Makeup and Replenishment

390210 TG-25E Additive A Salt For Makeup and Replenishment

390204A TG-25 Additive E Liquid For Makeup and Replenishment

390214B TG-25E Buffer Salts Solid For Makeup and Replenishment

390100 Techni Gold 25 ES pH- Liquid For pH Adjustment

390101 Techni Gold 25 ES pH+ Liquid For pH Adjustment

391427 Techni Gold 25 ES RTU Liquid For Makeup and Replenishment 391428 Rev 0214

TECHNI GOLD 25 ES Appendix Page 1

ANALYSIS FOR TG-25E BUFFER SALTS IN TECHNI GOLD 25 ES Reagents: 0.1 N Iodine

Starch indicator solution Procedure:

1. Pipette 5 ml of sample into a 1 liter Erlenmeyer flask.

2. Dilute to 500 ml with distilled water.

3. Add 5 ml of starch indicator solution.

4. Titrate with 0.1 N Iodine to a faint blue endpoint (stirring constantly). Calculation:

oz/gal of TG-25E Buffer Salts = mls of 0.1 N Iodine x 0.1683

g/l of TG-25E Buffer Salts = mls of 0.1 N Iodine x 1.2623 Na2SO3 + I2 + H2O 2 HI + Na2SO4

TECHNI GOLD 25 ES Appendix Page 2

ANALYTICAL PROCEDURE FOR TG-25E STABILIZER Equipment: 2 ml pipette 500 ml volumetric flask Spectrophotometer capable of absorbance measurement at wavelength of 266 nm. Quartz cuvette Procedure:

1. Pipet 2 ml of plating solution into a 500 ml volumetric flask. Fill to mark with DI water.

2. Using a clean cuvette, determine the absorbance of DI water at 266 nm. This is the blank value.

3. In the same cuvette, determine the absorbance of the diluted solution at 266 nm.

4. Subtract the blank from the sample absorbance.

5. Use this net absorbance to determine the stabilizer concentration from the attached curve.

6. Useable stabilizer range is 2.5 8.0 g/l of solution. Optimum range is 4 6.5 g/l.

Calibration Curve for TG-25E Stabilizer

0

0.2

0.4

0.6

0.8

1

1.2

1.4

0 1 2 3 4 5 6 7 8 9

Stabilizer Concentration (g/l)

Abs

orba

nce

(266

nm)

391428 Rev 0214

TECHNI GOLD 25 ESTECHNI GOLD 25 ES is a neutral non-cyanide gold plating formulation suitable for electronics, semiconductor, wafer, electroforming, or general applications. Without additives, the solution yields soft, bright-to-satin-bright deposits meeting the req...EQUIPMENT/MATERIALS OF CONSTRUCTIONEQUIPMENT PREPARATION

MetricLeaching Solution

ANALYSIS FOR TG-25E BUFFER SALTS IN TECHNI GOLD 25 ES

techni gold 25 es data sheet

Documents