描述
Micromax 1939R 8-12 kΩ/sq Resistor Paste for Pd/Ag Multilayer Hybrids, 30-Min Firing
Type: Resistor Paste
Pack: 100G / 1000G
Resistivity: 8-12 kΩ/sq
Viscosity: 145-210 Pa.s
Firing: 850°C / 30 min
Shelf Life: 6 months
MacDermid Alpha Micromax 1939R is a high-resistance resistor paste from the 1900 Series, specifically formulated for palladium silver multilayer hybrid circuits. Offering 8-12 kΩ/sq sheet resistivity with a fast 30-minute 850°C firing cycle — part of the high-resistance blendable sub-series from 3kΩ/sq through 1MΩ/sq over Micromax 5704 dielectric.
Part of the Micromax 1900 Series materials system, Micromax 1939R is a high-resistance resistor paste engineered for palladium silver multilayer hybrid circuits requiring high stability and reliability. This composition delivers TCR values within ±100 ppm/°C with palladium silver terminations over Micromax 5704 dielectric, and maintains excellent post-laser trim stability after thermal cycling, shock, and extended storage. The system is optimized for a 30-minute firing cycle, enabling significantly faster throughput compared to conventional thick film processes.
With a sheet resistivity of 8-12 kΩ/sq, Micromax 1939R supports high-resistance resistor applications in multilayer configurations. The paste is optimized for 200-mesh screens with 8-12 μm emulsion thickness, producing a dried film thickness of 22-28 μm. The 30-minute firing cycle with a 10-minute peak at 850°C is compatible with palladium/silver conductors Micromax 6134 and 7484R, over Micromax 5704 dielectric on 96% alumina substrates. As part of the high-resistance blendable sub-series, Micromax 1939R blends smoothly with adjacent members from 3kΩ/sq through 1MΩ/sq. Available in 100G and 1000G containers.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We maintain stable inventory of authentic MacDermid Alpha Micromax 1939R resistor paste. Factory-original TDS and batch-specific COA can be provided upon request for your multilayer hybrid circuit projects.
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Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 1939R
- Fast 30-minute firing profile — 10-minute peak at 850°C for high-throughput multilayer circuit production
- Sheet resistivity of 8-12 kΩ/sq — high-resistance range for versatile multilayer hybrid applications
- Palladium silver multilayer system — fully compatible with Micromax 6134/7484R conductors and 5704 dielectric
- TCR within ±100 ppm/°C — stable temperature performance across the operating range
- Exceptional post-laser trim stability — <0.5% average ΔR after thermal shock, solder dip, and long-term storage
- Wide process latitude — high-yield performance even under high-throughput production conditions
- Blendable within high-resistance sub-series — adjacent members from 3kΩ/sq to 1MΩ/sq blend smoothly
- Phthalate and cadmium free — formulated without intentional addition of restricted substances
Primary Applications
- Palladium silver multilayer hybrid circuits — high-resistance resistor networks in multilayer configurations
- Precision analog and instrumentation circuits — stable resistive elements requiring 8-12 kΩ/sq range
- High-reliability aerospace and defense electronics — critical multilayer circuits requiring proven stability
- Medical device hybrid assemblies — dependable resistor elements for diagnostic and monitoring equipment
Full Technical Specifications
| Property | Typical Value | Test / Reference |
| Product Type | Thick film resistor paste | — |
| Application | Palladium silver multilayer hybrid circuits | — |
| Packaging Specification | 100G, 1000G | Standard packaging |
| Resistivity Range | 8-12 kΩ/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 | 8-12 μm | — |
| Recommended Film Thickness | 22-28 μm | Dried thickness |
| Drying Time | 10-15 min | 150°C |
| Drying Temperature | 150°C | — |
| Firing Peak Temperature | 850°C | 10 min at peak, 30 min total |
| Hot TCR (25-125°C) | -100 to 100 ppm/°C | Over Micromax 5704 dielectric |
| Cold TCR (-55-25°C) | -100 to 100 ppm/°C | Over Micromax 5704 dielectric |
| Short Term Overload Voltage | 145 V/mm | 5 sec duration |
| Standard Working Voltage | 58 V/mm | 0.4 × Short Term Overload Voltage |
| Termination Compatibility | Micromax 6134 / 7484R Pd/Ag conductor | Prefired at 850°C |
| Dielectric Compatibility | Micromax 5704 multilayer dielectric | Fired at 850°C |
| Substrate Compatibility | 96% alumina | — |
| Encapsulant | Glass encapsulation not required or recommended | — |
| Environmental Compliance | Phthalate and cadmium free | — |
| 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 | 8-12 μm |
| Dried Film Thickness | 22-28 μm |
| Leveling Time | 5-10 minutes at room temperature |
| Drying Temperature | 150°C |
| Drying Time | 10-15 minutes |
| Firing Peak Temperature | 850°C |
| Total Firing Cycle | 30 minutes (10 min at peak) |
| Firing Atmosphere | Air |
| Substrate | 96% alumina |
| Dielectric | Micromax 5704 multilayer dielectric |
| Termination | Micromax 6134 / 7484R Pd/Ag 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 8250 thinner sparingly for evaporative losses. |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 1939R 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 1939R?
Micromax 1939R is a high-resistance resistor paste from the 1900 Series, designed for palladium silver multilayer hybrid circuits with 8-12 kΩ/sq resistivity and a fast 30-minute firing cycle.
What is the firing cycle for Micromax 1939R?
A 30-minute firing cycle with a 10-minute peak hold at 850°C — significantly faster than conventional 60-minute profiles.
What resistivity value does Micromax 1939R offer?
Micromax 1939R provides a sheet resistivity of 8-12 kΩ/sq (8000-12000 Ω/sq) for high-resistance multilayer applications.
What is the viscosity of Micromax 1939R?
Viscosity is 145-210 Pa.s, measured with a Brookfield HAT viscometer at 10 rpm and 25°C.
What terminations are compatible with Micromax 1939R?
Micromax 6134 and 7484R palladium/silver conductors, prefired over Micromax 5704 dielectric at 850°C.
Is Micromax 1939R blendable with other resistor pastes?
Yes, it is part of the high-resistance blendable sub-series from 3kΩ/sq through 1MΩ/sq, along with 1935R, 1949R and 1959.
What is the TCR performance of Micromax 1939R?
TCR is within -100 to 100 ppm/°C, ensuring stable temperature performance in multilayer hybrid circuits.
What packaging options are available for Micromax 1939R?
Standard 100G and 1000G containers. Bulk supply options are available upon request.
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We supply authentic MacDermid Alpha Micromax 1939R resistor paste for palladium silver multilayer hybrid circuit applications. 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.
