描述
MacDermid Alpha Micromax 5785R Aluminum Bondable High-Density Gold Conductor for Fine-Line Circuits
Type: Aluminum Bondable Gold Conductor
Application: High-Frequency, Fine-Line
Solids: 87–89%
Shelf Life: 6 months
Micromax 5785R is a very high-density gold conductor composition suitable for applications requiring high frequency and/or fine line conductor features. It offers excellent wire bond acceptance yields with 1 & 2 mil Au wire and 1 & 10 mil Al wire over alumina, a dense fired film, smooth surface appearance, REACH and RoHS compliance, and compatibility with Micromax Pb-free Resistor Series and Dielectric QM44.
Micromax 5785R from MacDermid Alpha is a very high-density gold conductor composition developed for applications that require high frequency performance and/or fine line conductor features. It is positioned as a high reliability Au conductor, with a specific strength in aluminum wire bonding: excellent wire bond acceptance yields with 1 & 2 mil Au wire and 1 & 10 mil Al wire over alumina. The fired film is dense with a smooth surface appearance, and the composition is compatible with Micromax Pb-free Resistor Series and Dielectric QM44. Lead, phthalate, and cadmium are not intentionally added, and the product is REACH and RoHS compliant.
The paste carries 87–89% solids and a viscosity range of 300–400 Pa.s. Micromax 8672 is the listed solvent or thinner. Reported properties are based on 96% alumina substrates. A 325 or 400 mesh stainless steel screen with 12.5 μm (0.5 mil) emulsion thickness is recommended, and printing speeds up to 15 cm/s (6 in/s) can be used. Recommended film thickness is 5–9 μm, with print resolution of 150 μm / 100 μm and theoretical coverage of 60–90 cm²/g. Allow the wet print to level 10–15 minutes at room temperature, then dry at 150°C for 15 minutes. Fire dried prints in a belt furnace on a 30 or 60-minute cycle with a peak temperature of 850°C. No significant changes are observed after refires at 850°C. Resistivity is ≤6 mΩ/sq at 10 μm fired thickness. Store sealed at 5–30°C; unopened shelf life is 6 months.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We hold regular stock of authentic MacDermid Alpha Micromax 5785R gold conductor paste. Original factory TDS and batch-specific COA are available on request for your high-frequency and fine-line hybrid programs.
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Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 5785R
- Very high-density gold conductor composition
- Suitable for high frequency and/or fine line conductor features
- Excellent for fine line features over alumina substrate
- Excellent wire bond acceptance yields with 1 & 2 mil Au and 1 & 10 mil Al wire over alumina
- Dense fired film with smooth surface appearance
- Lead, phthalate, and cadmium free (no intentional addition)
- REACH and RoHS compliant
- Compatible with Micromax Pb-free Resistor Series and Dielectric QM44
- Solids 87–89% and viscosity 300–400 Pa.s
- Screen: 325 or 400 mesh stainless steel with 12.5 μm (0.5 mil) emulsion
- Firing: 30 or 60-minute cycle, 850°C peak
- Resistivity ≤6 mΩ/sq at 10 μm; thinner Micromax 8672
Primary Applications
- High-frequency circuits — high density gold conductor layer
- Fine-line conductor features — print resolution down to 100 μm
- High reliability Au conductor — per TDS application field
- Aluminum wire bonding — 1 & 10 mil Al wire over alumina
- Circuits with QM44 dielectric — compatible with Micromax QM44
Full Technical Specifications
| Property | Typical Value | TDS Reference |
| Product Type | High-density gold conductor paste | TDS: Aluminum Bondable AU Conductor |
| Application | High reliability Au conductor | TDS: High reliability Au conductor |
| Solvent or Thinner | Micromax 8672 | TDS: Micromax 8672 |
| Solid Content | 87 to 89 % | TDS: 87 to 89 % |
| Viscosity | 300 to 400 Pa.s | TDS: Brookfield HBT, UC&SP, SC4-14/6R, 10 rpm, 25°C |
| Mask Mesh | 325 to 400 | TDS: 325 to 400 |
| Mask Emulsion | 12.5 μm (0.5 mil) | TDS: 12.5 μm |
| Drying Time | 15 minutes | TDS: 15 min |
| Drying Temperature | 150 °C | TDS: 150 °C |
| Theoretical Coverage | 60 to 90 cm²/g | TDS: 60 to 90 cm²/g |
| Recommended Film Thickness | 5 to 9 μm | TDS: 5 to 9 μm |
| Print Resolution | 150 μm / 100 μm | TDS: 150 μm / 100 μm |
| Leveling Time | 10 to 15 minutes | TDS: 10 to 15 min |
| Resistivity | ≤6 mΩ/sq at 10 μm fired thickness | TDS: ≤6 mΩ/sq |
| Substrate Compatibility | 96% alumina; compatible with Micromax Pb-free Resistor Series and Dielectric QM44 | TDS: 96% alumina; QM44 |
| Screen Type | 325 or 400 mesh stainless steel with 12.5 μm (0.5 mil) emulsion | TDS: 325 or 400 mesh, 12.5 μm |
| Printing Speed | Up to 15 cm/s (6 in/s) | TDS: 15 cm/s (6 in/s) |
| Firing Profile | 30 or 60-minute cycle, 850°C peak | TDS: 30 or 60 min cycle, 850°C |
| Refiring Stability | No significant changes after refires at 850°C | TDS: Firing |
| Wire Bonding | Excellent wire bond acceptance yields with 1 & 2 mil Au and 1 & 10 mil Al wire over alumina | TDS: Product benefits |
| Lead, Phthalate, Cadmium Free | Yes (no intentional addition) | TDS: Product benefits |
| REACH and RoHS Compliant | Yes | TDS: Product benefits |
| Shelf Life | 6 months | TDS: 6 months |
| Storage Temperature | 5 – 30 °C | TDS: 5°C – 30°C |
Note: All listed values are typical and may vary by batch. Values based on MacDermid Alpha official TDS. Independent qualification testing is required prior to production use. “Lead, Phthalate and Cadmium free” as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
Recommended Processing Conditions
| Parameter | Recommended Value | TDS Reference |
| Mixing Prior to Use | Thoroughly mix to redisperse solids | TDS: thoroughly mix |
| Screen Mesh | 325 or 400 mesh stainless steel with 12.5 μm (0.5 mil) emulsion | TDS: 325 or 400 mesh, 12.5 μm |
| Printing Speed | Up to 15 cm/s (6 in/s) | TDS: 15 cm/s (6 in/s) |
| Leveling | 10–15 minutes at room temperature | TDS: 10-15 minutes |
| Drying | 150°C for 15 minutes | TDS: 150°C for 15 min |
| Firing | 30 or 60-minute cycle, 850°C peak, belt furnace | TDS: 30 or 60 min cycle, 850°C |
| Refiring | No significant changes after refires at 850°C | TDS: Firing |
| Thinner | Micromax 8672 | TDS: Micromax 8672 |
Handling and Storage Recommendations
| Storage Rules | Store tightly sealed in a clean, stable environment at 5-30°C. | TDS: 5°C – 30°C |
| Shelf Life | 6 months in unopened containers from date of shipment. | TDS: 6 months |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling of solids may occur during storage. | TDS: thoroughly mix |
| Transportation | Under normal shipping conditions, no temperature control is expected. For extended transport periods, confirm product suitability. | TDS: normal shipping conditions |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 5785R original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
| SDS | Safety Data Sheet for handling and storage | Request SDS |
Frequently Asked Questions
How does 5785R compare with 5780R?
Both are high-density gold conductors for high-frequency and fine-line applications, with 87–89% solids and 300–400 Pa.s viscosity. 5785R adds aluminum wire bonding capability, with excellent wire bond acceptance yields documented for 1 & 10 mil Al wire in addition to 1 & 2 mil Au wire, while 5780R is positioned primarily for Au wire bonding.
What Al wire sizes can 5785R bond to?
The TDS lists excellent wire bond acceptance yields with 1 & 10 mil Al wire over alumina, in addition to 1 & 2 mil Au wire.
What is the resistivity of 5785R?
Resistivity is 6 mΩ/sq or less at 10 μm fired thickness.
What compliance declarations does 5785R carry?
Per the TDS, 5785R is lead, phthalate, and cadmium free, with these substances not intentional ingredients and not intentionally added. The product is also REACH and RoHS compliant.
What screen setup works with 5785R?
A 325 or 400 mesh stainless steel screen with 12.5 μm (0.5 mil) emulsion thickness is recommended. Printing speeds up to 15 cm/s (6 in/s) can be used.
What firing profile does 5785R use?
Fire dried prints in a belt furnace on a 30 or 60-minute cycle with a peak temperature of 850°C. No significant changes are observed after refires at 850°C.
How should 5785R be stored?
Store tightly sealed at 5–30°C in a clean, stable environment. Unopened shelf life is 6 months from shipment. Some settling may occur, so mix thoroughly before reuse.
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We supply authentic MacDermid Alpha Micromax 5785R gold conductor paste for high-frequency and fine-line hybrid programs. Contact our team for bulk quotations, sample availability, technical documentation, and application support.
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Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots. “Lead, Phthalate and Cadmium free” as used herein means these substances are not intentional ingredients and are not intentionally added. Trace amounts may be present.
