Copper Cleaner/Oxide and Chromate Remover
MicroClean™ EC-1 (RDZ-1603) is a powerful low foam cleaner/nanoetch for removing finger prints, chromate, and oxide residues from copper prior to photoresist lamination. Replenishment is based on consumption of the acidity in the product. MicroClean™ EC-1 (RDZ-1603) baths may be replenished, until the dissolved Copper level gets so high that the cleaner etches the substrate excessively.In most cases, the acceptable maximum level of dissolved metal will be 2000 PPM. If solution dragout is significant, this level may never be reached, so that it may be possible to run with only bath replenishment, based on analysis of the bath acidity. Increasing bath temperature will increase metal removal rate.
MAKE-UP:
Make up MicroClean™ EC-1 (RDZ-1603) at 15 ± 5% by volume in tap or deionized water. Higher make up levels give greater anti-tarnish properties.
OPERATION:
Operate at 75-120° F, for 30-120 seconds, depending on temperature. If used in spray, heat to at least 80° F before turning on pumps, otherwise cleaner may foam excessively. Analyze periodically (every 4 hours initially, later may be once per shift). Keep concentration of product at 15 ± 5%. Do not exceed operating temperature of 130° F. Optimum temperature range is 80-90° F. Control by titration, see reverse for procedure.
EQUIPMENT:
Use plastic or titanium. Quartz, Teflon or Titanium heaters may be used. DO NOT use Stainless Steel equipment.
SAFETY:
Use caution, MicroClean™ EC-1 (RDZ-1603) contains Hydrochloric Acid. Rinse skin or eyes if contact is made. Consult Material Safety Data Sheet for further information.
DISPOSAL:Neutralize and precipitate any dissolved heavy metals. Dispose of in accordance with Federal, State and local regulations. Contact your RD Chemical representative for further information.
PACKAGING:
MicroClean™ EC-1 (RDZ-1603) is available in 15 & 55 gallon poly drums.
A. Procedure for Determining Concentration of MicroClean™ EC-1 (RDZ-1603)
Equipment Required:- 1 (50 ml) Buret
- 1 Titration Flask
- 1 25 ml pipet
- Magnetic Stirrer (optional)
- 1.OO N NaOH (Sodium Hydroxide)
- Phenolphthalein indicator solution
- 1. Put 25 ml sample of cleaner bath into titration flask.
- 2. Add few drops Phenolphthalein indicator solution to flask.
- 3. Titrate with 1.00N NaOH to first permanent trace of red. Note mls required.
Percent by Volume MicroClean™ EC-1 (RDZ-1603) = mls 1.00N NaOH X 0.966
B. Procedures for Determining Dissolved Copper In MicroClean™ EC-1 (RDZ-1603)
Copper may be determined by Atomic Absorbtion, Colorimetrically, or by Iodometric Titration. Colorimetric method is available on request, and will need to be customized for the particular Colorimeter.Iodometric method for determining Dissolved Copper Content:
- 1. Take 100 ml sample of cleaner bath
- 2. Add 5 mls con. HCl and 3-5 grams of Potassium Iodide
- 3. Titrate to near colorless with 0.100N Sodium Thiosulfate, add few mls Starch indicator, continue titrating until colorless.
PPM Dissolved Copper = mls 0.100N Sodium Thiosulfate X 63.5
RD Chemical Company makes these recommendations in good faith, based on laboratory and field testing. Ultimate responsibility for propriety of use, however, must rest with the purchaser and user. RD Chemical Company recommends thorough testing of its products, before use.