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651826

Sigma-Aldrich

Chromium etchant

standard

Sinonimo/i:

Cr etching solution

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500 ML
CHF 149.00

CHF 149.00

Spedizione prevista il01 giugno 2025

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500 ML
CHF 149.00

About This Item

Numero MDL:
MFCD07370678
Codice UNSPSC:
12352300
NACRES:
NA.23

CHF 149.00

Spedizione prevista il01 giugno 2025

Richiedi un ordine bulk

Grado

standard

Composizione

volatiles, 85%

Colore

orange

P. ebollizione

100 °C/1 atm

Densità

1.16 g/mL at 25 °C

Categorie correlate

Descrizione generale

  • Appearance - Clear orange
  • pH - Acidic
  • Etch Rate at 40 °C - 40 Å/second
  • Etch Capacity (rate declines at ~70%) - 65 g/gallon
  • Shelf Life - 1 year
  • Storage Conditions - Ambient
  • Filtration - 0.2 µm
  • Recommended Operating Temperatures - 20-80 °C (30-40 °C most common)
  • Rinse - Deionized water
  • Photoresist Recommendations - KLT6000 Series, KLT 5300 Series, HARE SQT (SU-8 type), TRANSIST, or PKP -308PI
  • Select Compatible Materials - Au, Ti, oxide, nitride, Si
  • Select Incompatible Materials - Al, Ni, Cu, NiCr
  • Compatible Plastics - HDPE, PP, PTFE, PFA, PVC
  • Isotropy - Isotropic
  • Incompatible Chemicals - Strong bases
Ceric ammonium nitrate-based etchant. Etch rate of 40 Å/sec @ room temp. Etches cleanly with only a deionized water rinse needed.
Chromium etchant is a chromium based solution that removes the excess metal from the substrate. These etchants are majorly used in metal finishing and electronic industry. It has an etch rate of 4 mm/s and can be used to etch nickel, copper, and chromium based excess metals.[1][2][3][4]
Our chromium etchant is high purity ceric ammonium nitrate system for precise, clean etching of chromium and chromium oxide films. Compatible with positive and negative photoresists. Our chromium etchant is filtered to remove all particulates above 0.2 microns. Etching temperature varies depending on film thickness. Etch times range from 15 seconds to 60 seconds at room temperature. Chromium Etchants should be operated in a well-ventilated hood.

Applicazioni

For use at room temperature or elevated temperature. Etches cleanly, eliminating need for an intermediate rinse. Etching temperature varies with regard to film thickness. Etch times range from 15 to 60 seconds at room temperature. Note, chromium etchants should be handled in a well ventilated hood.
The product can etch Al, Cr, Cu, Ni, GaAs. It can surface oxidize Si, Ta/TaN, however, it has no effect on Au, Si3N4, SiO2, Ti, and W surfaces[5]

Caratteristiche e vantaggi

Designed for precise, clean etching of chromium and chromium oxide films. Compatible with both positive and negative photoresists. Filtered to 0.2 micron to remove particlulates.

Avvertenze

Danger

Indicazioni di pericolo

H272,H290,H314,H317,H411

Classi di pericolo

Aquatic Chronic 2 - Eye Dam. 1 - Met. Corr. 1 - Ox. Liq. 2 - Skin Corr. 1B - Skin Sens. 1

Rischi supp

EUH071

Codice della classe di stoccaggio

5.1B - Oxidizing hazardous materials

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

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Certificati d'analisi (COA)

Lot/Batch Number
MKCW6429
MKCV2641
MKCT6171
MKCS3415
MKCQ5677

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Protocolli

Negative Photoresist Procedure

Photoresist kit offers pre-weighed chemical components for lithographic processes, with separate etchants for various substrate choices.

Questions

1–3 of 3 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  3. Does this product etch Ti and TiO2? If so, what is the etch rate?

    1 answer

    1. The chromium etchant, product 651826, is compatible with titanium, meaning it does not etch titanium. While there is no specific information on TiO2, it is assumed that the same is true. The etch rate at 40°C is 40 Å/sec, and the rate will approximately double with every 10°C increase in temperature. Additionally, the rate of stirring or agitation will also increase the etch rate.

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