描述
Micromax 1721 Thick Film Resistor Paste | MacDermid Alpha, Excellent Laser Trim Stability
Type: Resistor Paste
Pack: 100G / 1000G
Resistivity: 10Ω-1MΩ/sq
Viscosity: 145-210 Pa.s
Firing: 850°C / 60 min
Shelf Life: 6 months
MacDermid Alpha Micromax 1721 is a screen-printable resistor composition offering a resistivity range of 10Ω/sq to 1MΩ/sq with TCR below 100 ppm/°C and post-trim stability under 0.5% ΔR. Optimized for 850°C air firing in high reliability hybrid circuits.
Developed as part of the Micromax Series 1700 materials system, this resistor paste is engineered for hybrid circuit manufacturing environments that demand consistent electrical performance and minimal resistance drift. The composition maintains TCR below 100 ppm/°C even when blended with adjacent resistance values, and exhibits low sensitivity to variations in firing temperature, peak hold time, and printed geometry — providing a robust process window for volume production.
Available across a broad resistivity range from 10Ω/sq to 1MΩ/sq, Micromax 1721 supports precision resistor network applications on 96% alumina substrates with Micromax 7484R Ag/Pd conductor terminations. It is optimized for 200-mesh stainless steel screens with 12-18 μm emulsion, achieving a dried thickness of 22-28 μm. The 60-minute firing cycle with 10-minute peak at 850°C delivers repeatable electrical performance. Standard packaging options include 100G and 1000G containers.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We maintain stable inventory of authentic MacDermid Alpha Micromax 1721 resistor paste. Factory-original TDS and batch-specific COA can be provided upon request for your hybrid circuit projects.
Request Sample, TDS & Quotation
Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 1721
- Resistivity range from 10Ω/sq to 1MΩ/sq — covers broad resistance values for diverse network designs
- Exceptional laser trim stability — average ΔR below 0.5% across all standard test conditions
- Low TCR under 100 ppm/°C — stable temperature coefficient even with blended resistor grades
- Minimal sensitivity to process variations — tolerates fluctuations in firing temperature, dwell time, and geometry
- Built for high reliability hybrid assemblies — formulated for demanding long-lifespan applications
- 850°C air firing optimized — 60-minute cycle with 10-minute peak hold for consistent output
- Silver/palladium termination compatible — validated with Micromax 7484R Ag/Pd conductor
- RoHS and REACH compliant — meets global environmental standards
Primary Applications
- Hybrid microcircuits requiring high stability — assemblies where long-term resistance stability is critical
- Multi-value precision resistor arrays — networks requiring multiple resistance values on a single substrate
- Industrial control and instrumentation — stable resistor elements for measurement and control systems
- Aerospace and defense hybrid electronics — robust components for mission-critical avionics and systems
Full Technical Specifications
| Property | Typical Value | Test / Reference |
| Product Type | Thick film resistor paste | — |
| Application | High reliability hybrid circuits, precision resistor networks | — |
| Packaging Specification | 100G, 1000G | Standard packaging |
| Resistivity Range | 10Ω-1MΩ/sq | 1.5mm × 1.5mm geometry |
| Viscosity (Brookfield HAT 10 rpm) | 145-210 Pa.s | SC4-14/6R, 25°C |
| Recommended Mesh | 200 mesh | Stainless steel |
| Emulsion Thickness | 12-18 μm | — |
| Recommended Film Thickness | 22-28 μm | Dried thickness |
| Drying Temperature | 150°C | — |
| Firing Peak Temperature | 850°C | 10 min at peak, 60 min total |
| TCR Performance | <100 ppm/°C | 25-125°C / -55-25°C |
| Post Laser Trim Stability | <0.5% ΔR | All standard test conditions |
| Process Sensitivity | Low | Firing temperature, time, geometry |
| Termination Compatibility | Micromax 7484R Ag/Pd conductor | Prefired at 850°C |
| Substrate Compatibility | 96% alumina | — |
| Encapsulant | Glass encapsulation not required (QQ550 recommended for extreme environments) | — |
| Environmental Compliance | RoHS, REACH | — |
| Shelf Life | 6 months in unopened containers | — |
| Storage Temperature | 5-30°C | — |
Note: All listed values are typical and may vary by batch. Independent qualification testing is required prior to production use.
Recommended Processing Conditions
| Parameter | Recommended Value |
| Mixing Prior to Use | Slow gentle hand-stirring, 1-2 minutes |
| Optimal Printing Temperature | 20-23°C |
| Screen Mesh | 200 mesh stainless steel |
| Emulsion Thickness | 12-18 μm |
| Dried Film Thickness | 22-28 μm |
| Leveling | Allow to level at room temperature |
| Drying Temperature | 150°C |
| Firing Peak Temperature | 850°C |
| Total Firing Cycle | 60 minutes (10 min at peak) |
| Firing Atmosphere | Air |
| Substrate | 96% alumina |
| Termination | Micromax 7484R Ag/Pd conductor |
| Resistor Geometry | 1.5mm × 1.5mm |
Handling and Storage Recommendations
| Storage Rules | Store in tightly sealed containers in clean, stable environment at 5-30°C. |
| Shelf Life | 6 months in unopened containers from date of shipment. |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling may occur during storage. |
| Thinning | Not normally required; use Micromax 4036 thinner sparingly for evaporative losses. |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 1721 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
What is MacDermid Alpha Micromax 1721?
Micromax 1721 is a Series 1700 resistor paste for high reliability hybrid circuits, offering TCR below 100 ppm/°C and post-trim stability under 0.5% ΔR.
What resistivity range does Micromax 1721 cover?
It covers 10Ω/sq to 1MΩ/sq, accommodating diverse precision resistor network requirements.
What is the viscosity of Micromax 1721?
Viscosity is 145-210 Pa.s at 25°C (Brookfield HAT, SC4-14/6R, 10 rpm).
What firing profile is recommended?
A 60-minute cycle with 10-minute peak at 850°C. Includes 20 minutes above 800°C and 30 minutes above 600°C.
What dried film thickness is recommended?
22-28 μm with 200 mesh screens and 12-18 μm emulsion.
How stable is Micromax 1721 after laser trimming?
Less than 0.5% average ΔR under all standard testing conditions.
What terminations are compatible?
Micromax 7484R Ag/Pd conductor, prefired at 850°C. Other Ag/Pd compositions also work.
What packaging options are available?
Standard 100G and 1000G. Bulk options available upon request.
Get MacDermid Alpha Micromax 1721 Bulk Pricing and Technical Support
We supply authentic MacDermid Alpha Micromax 1721 resistor paste for high reliability hybrid circuit manufacturing. Contact us for bulk quotes, 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.
