Electronic Powders and Pastes Portfolio

Challenge

During the development phase, the customer encountered several challenges:

• Difficulty maintaining uniform electrode thickness during high-speed screen printing
• Inconsistent nickel electrode density after sintering
• Increased defect rates caused by electrode discontinuity
• Need for a cost-effective alternative to precious metal electrode systems

The customer was looking for a nickel paste solution that could provide:

• Stable rheological behavior
• Good compatibility with ceramic dielectric materials
• High conductivity after firing
• Reliable batch-to-batch consistency

Alfa Chemistry Solution

Alfa Chemistry supplied MLCC Nickel Paste for Screen Printing optimized for internal electrode fabrication.

The material was selected based on the customer's manufacturing requirements:

Product:

MLCC Nickel Paste for Screen Printing

Key Characteristics:

• Controlled nickel particle size distribution
• High metal loading capability
• Stable viscosity for precision printing
• Excellent sintering compatibility under reducing atmosphere conditions

Alfa Chemistry also provided technical support regarding paste handling, printing parameters, and process optimization.

Application Process

The nickel paste was integrated into the customer's MLCC manufacturing process:

• Ceramic dielectric layer preparation
• Screen printing of nickel internal electrodes
• Layer stacking and lamination
• Co-firing process under controlled atmosphere
• Electrical performance evaluation

Results

After process optimization, the customer achieved improved electrode consistency.

The successful implementation helped the customer improve production reliability and reduce material-related defects in high-capacitance MLCC manufacturing.

Project Value

By supplying reliable MLCC nickel paste and technical support, Alfa Chemistry helped the customer establish a more stable electrode fabrication process for next-generation ceramic capacitors.

Challenge

The customer's previous metallization materials showed several limitations:

• Insufficient adhesion between conductor layers and ceramic substrates
• Increased resistance after firing
• Difficulty maintaining dimensional accuracy in multilayer structures
• Performance degradation at high frequencies

The customer needed a silver paste with:

• High conductivity
• Strong ceramic adhesion
• Stable firing characteristics
• Compatibility with LTCC manufacturing processes

Alfa Chemistry Solution

Product:

Silver Paste for LTCC

The material was selected for LTCC metallization due to its:

• High-purity silver composition
• Optimized particle distribution
• Excellent sintering behavior
• Good compatibility with ceramic substrates

Technical recommendations were provided regarding:

• Paste storage conditions
• Printing parameters
• Firing temperature optimization

Application Process

The silver paste was applied in the customer's LTCC fabrication workflow:

1. LTCC ceramic tape preparation
2. Via filling and conductor pattern printing
3. Multilayer stacking
4. Low-temperature co-firing
5. RF performance evaluation

Results

The optimized metallization process demonstrated improved electrical and mechanical performance.

The LTCC modules achieved improved signal transmission performance and enhanced manufacturing consistency.

Project Value

Alfa Chemistry's LTCC silver paste provided the customer with a reliable metallization solution for high-frequency ceramic electronic devices, supporting the transition from prototype development to stable production.

Challenge

Traditional solder materials presented several limitations:

• Limited high-temperature reliability
• Thermal fatigue during long-term operation
• Insufficient heat dissipation capability
• Performance degradation under high-power cycling conditions

The customer required an advanced interconnect material with:

• High thermal conductivity
• Strong mechanical reliability
• Lead-free characteristics
• Compatibility with semiconductor packaging processes

Alfa Chemistry Solution

Alfa Chemistry supplied:

Product:

Sinter Silver/Copper Paste

The material was designed for semiconductor die attachment and power module interconnection.

Key advantages included:

• High silver content
• Excellent thermal conductivity
• Reliable pressure-assisted sintering performance
• High-temperature operational stability

Application Process

The sinter silver paste was evaluated in semiconductor packaging:

1. Paste dispensing on substrate
2. Semiconductor die placement
3. Sintering process
4. Thermal cycling evaluation
5. Electrical reliability testing

Results

The material demonstrated excellent bonding performance.

The customer achieved improved thermal management capability and enhanced reliability for high-power semiconductor modules.

Project Value

Through the adoption of Alfa Chemistry's sinter silver paste, the customer successfully developed a more reliable semiconductor interconnect solution suitable for demanding power electronics applications.