Description
Data Sheet

1. Overview of LTCC Technology

Name: Low Temperature Co-fired Ceramic PCB(LTCC PCB)
Brand: PCB Printed Circuit Board and PCBA manufacturing
Rating: 5 (1 reviews)

Low Temperature Co-Fired Ceramic (LTCC) technology is a high-precision three-dimensional integration technology for complex microwave and digital circuits, which integrates advanced ceramic materials with microwave thick-film integration processes. With the rapid advancement of monolithic integration technology, the integration level of active devices has reached an unprecedented height, thereby highlighting the critical role of passive component integration. LTCC technology effectively meets the integration requirements of key passive devices, including resistors, capacitors, inductors, filters, and couplers, providing a reliable technical solution for high-density circuit integration.

2. Core Technical Parameters of LTCC Substrates

Standard resistance specifications for LTCC substrates include 10Ω, 100Ω, 1KΩ, and 10KΩ. The resistance adjustment accuracy of surface-mounted resistors is better than 1%, while the accuracy of embedded resistors is within ±30%. Other passive components (capacitors, inductors, etc.) can be customized according to specific material parameters and design requirements. LTCC substrates support multi-layer wiring design, with a maximum layer count of 40 layers, which can fully meet the layout needs of high-density integrated circuits.

3. Development and Application of LTCC PCB

In recent years, ceramic substrate technology has advanced rapidly. On the basis of traditional ceramic substrates, high-temperature co-fired ceramic (HTCC) and low-temperature co-fired ceramic (LTCC) substrates have been developed successively, greatly expanding the application scope of ceramic substrates in high-density assembly of high-power circuits. As a newly developed micro-assembly substrate, LTCC integrates the advantages of thick-film processes and high-temperature co-firing technology, and has achieved rapid development in the past decade.

As a high-density, high-speed circuit carrier, LTCC PCBs are widely used in key fields such as computers, communications, missiles, rockets, and radar. Typical application cases include: DuPont (USA) applies 8-layer LTCC multilayer substrates in the test circuits of Stinger missiles; Fujitsu (Japan) adopts 61-layer LTCC substrates to manufacture multi-chip modules for the VP2000 series supercomputers; NEC has developed a 78-layer LTCC multilayer substrate with an area of 225×225mm², which integrates 11,540 I/O terminals and can accommodate up to 100 VLSI chips.

4. Structural Composition of LTCC Multilayer Ceramic Substrates

An LTCC multilayer ceramic substrate is composed of multiple single ceramic layers. Each layer consists of a ceramic base and conductive circuits (commonly referred to as conduction bands) attached to the ceramic surface. Conductive materials are filled in the through-holes of the ceramic layers to connect conduction bands between different layers, forming a three-dimensional circuit network. IC chips are mounted on the top layer of the multilayer ceramic substrate, and the integrated chips are soldered to the internal circuits of the LTCC substrate through pins to form a complete interconnection circuit.

The metal conductive layer on the surface of the LTCC substrate is formed synchronously during the ceramic sintering process, and pin-shaped terminals are arranged at the bottom of the substrate. This structural design enables the LTCC substrate to assemble micro-components into a high-density, high-speed, and high-reliability three-dimensional structure, which is suitable for miniaturized and high-performance electronic equipment.

5. Core Advantages of LTCC PCB

Compared with other PCB technologies, LTCC PCB has significant advantages in electrical performance, environmental adaptability, and integration level, specifically reflected in the following aspects:

Excellent High-Frequency Performance: The ceramic materials used in LTCC have outstanding high-frequency transmission characteristics, wide passband, and adjustable dielectric constant within a wide range according to component ratios. Using high-conductivity metal materials as conductors can effectively improve the quality factor (Q value) of the circuit system and enhance the flexibility of circuit design.
Strong Environmental Adaptability: It can withstand high-current and high-temperature working conditions, and has better thermal conductivity than ordinary PCB boards. This greatly optimizes the heat dissipation design of electronic equipment, ensures high reliability in harsh environments, and extends the service life of the product.
High Integration and Miniaturization: It can realize high-layer wiring (up to 40 layers) and embed multiple passive components, eliminating the need for independent packaging of passive components, thereby reducing packaging costs. The three-dimensional high-layer circuit design enables the integration of passive and active components, improving circuit assembly density and further reducing the volume and weight of electronic products.
Good Process Compatibility: It has excellent compatibility with other multi-layer wiring technologies. For example, the combination of LTCC and thin-film wiring technology can realize hybrid multi-layer substrates and hybrid multi-chip modules with higher assembly density and better performance.
High Production Yield and Cost-Efficiency: The discontinuous production process allows quality inspection of each layer of wiring and interconnection holes before the final product is formed, which helps improve the yield and quality of multilayer substrates, shorten the production cycle, and reduce production costs.
Green and Environmental Protection: In line with the development trend of energy saving, material saving, and environmental protection in the component industry, LTCC technology minimizes environmental pollution caused by raw materials, waste, and production processes.

6. Typical Application Scenarios

6.1 Aerospace High-Frequency Microwave Integration

In aerospace electronic systems, LTCC PCBs serve as the core substrate for multilayer microwave integrated circuits, which need to maintain stable operation under extreme conditions such as thermal cycling and mechanical stress. The excellent dielectric properties of ceramic substrates support wide passband frequencies required by radar and communication modules, while embedded passive components effectively realize the miniaturization of assemblies. Its robust heat dissipation performance meets the compliance requirements of aerospace products, ensuring long-term stable operation. LTCC PCBs are seamlessly integrated into complex avionics module layouts to meet strict quality and reliability standards, supporting the stable operation of advanced aerospace systems.

6.2 Industrial Automation High-Speed Digital Circuits

Industrial automation systems require multilayer PCBs that can stably transmit high-speed digital data streams with high density and signal integrity. LTCC PCBs provide precise conductor patterning and tight stacking tolerances, which are essential for multi-gigabit communication protocols. The superior thermal management performance of ceramic substrates ensures consistent operation in harsh industrial environments (high temperature, high humidity, strong interference). Embedded passive components reduce board space and simplify system interconnections, and the structural design of LTCC PCBs is compatible with automated production lines that require strict quality inspection and consistent reproducibility, facilitating seamless integration into industrial control and instrumentation systems.

7. Frequently Asked Questions (FAQ)

Q1: What materials are used in LTCC PCBs?

A1: LTCC PCBs are composed of low-temperature co-fired ceramic substrates integrated with high-conductivity metal layers. This material combination ensures superior electrical performance and heat dissipation compared to standard PCB designs, making it particularly suitable for high-frequency and harsh-environment applications.

Q2: Can Maxipcb Circuits Limited provide customized LTCC PCBs according to project requirements?

A2: Yes, Maxipcb offers customized LTCC PCB design and manufacturing services, supporting up to 40 layers of wiring. Through embedded passive component design and precise conductor patterning, we can provide tailored solutions to meet the requirements of complex microwave and digital circuits.

Q3: What quality standards and certifications does Maxipcb hold for PCB manufacturing?

A3: Maxipcb Circuits Limited is certified with ISO9001, UL, and RoHS standards, adhering to strict international quality management systems. All production processes comply with IPC standards to ensure the delivery of reliable, high-performance special PCB products.

Q4: How does Maxipcb support the installation and maintenance of LTCC PCB products?

A4: Maxipcb provides detailed technical documentation and professional technical consultation services to assist customers in the installation and application of LTCC PCBs. Our professional team ensures the optimized integration of LTCC PCBs in demanding environments, improving product reliability and long-term performance.

Shape: max. 100 mm × 100 mm

Line width / spacing: min.0.075mm/0.15mm

Printed conductor thickness: 10 ~ 25 μ M

Printing line width accuracy: ± 10 μ M

Stack alignment accuracy: ≤ 30 μ M

Through hole diameter: min.0.1mm

Sintering shrinkage accuracy: ± 0.2%

Distance between conductor and shape edge: min.0.2mm

Distance between metal through hole and line: min.0.15mm

Overlap distance of resistance / Conductor: min.0.15mm

Resistance size: min.0.15mm × 0.15mm

Total number of media layers: s 40 layers

Application : Filter PcB, diplexer PCB, LTCC chip antenna PCB

Low Temperature Co-fired Ceramic PCB(LTCC PCB)

Description

Data Sheet