10-Layer Impedance Controlled PCB 90Ω Single-ended and 100Ω Differential featuring Blind and Buried Vias

Printed Circuit Boards are custom-made products; the images and specifications provided are for reference only.

General Description

This 10-layer impedance-controlled PCB is built on an ITEQ FR-4 substrate (Tg 180°C) and is designed for signal generator applications. Featuring a 1.6mm thickness, it sports a green Taiyo solder mask with white Taiyo silkscreen and immersion gold surface finish on pads. The board implements a controlled impedance architecture, with single-ended traces routed in the inner layers and differential pairs on the top and bottom layers. It utilizes HDI technology, incorporating blind vias from layer 1 to 3 and buried vias from layer 3 to 5. Fabrication complies with IPC 6012 Class 2 standards based on supplied Gerber data, and the boards are packaged in quantities of 25 per shipment.

Features and Our Advantages

1) High Tg materials shows excellent thermal reliability and CAF resistance providing long-term reliability for industrial and automobile application.

2) Gold pads have good oxidation resistance and good heat dissipation.

3) UL, ISO14001, IATF16949 certified factories

4) Higher than 98% on-time-delivery rate.

5) Customer complaint rate: <1%

6) No minimum order quantity. 1 piece is available

Applications

Modems, Data Logger, Wireless N Router, Modem Router Wireless, 24V Transformer, 3G USB, PLC Program, Embedded Development, Master Module, Computers

PCB Data Sheet

Single ended (line) impedance, Differential impedance

Definition of Characteristic Impedance

Characteristic impedance is defined as the total opposition that a transmission line presents to the propagation of high-frequency signals or electromagnetic waves at a specific frequency, relative to a reference plane. It is a complex quantity represented by the vector sum of resistance, inductive reactance, and capacitive reactance.

Classification of Characteristic Impedance

Common types of characteristic impedance include:

（1）Single-ended impedance: The impedance measured for an individual signal trace with respect to its reference plane.

（2）Differential impedance: The impedance measured between two closely spaced, equally sized traces driven by differential signals.

（3）Coplanar impedance: The impedance of a signal trace when it is positioned between and equally spaced from adjacent GND or VCC planes on the same layer.

The Determinant Condition Required for Impedance Control

Transmission Line Criteria and Impedance Control

A PCB trace is considered a transmission line when its physical length approaches 1/7 of the signal wavelength. In such cases, controlled impedance becomes essential. The decision to implement impedance control is ultimately driven by customer specifications; if specified for a particular trace width, it must be strictly adhered to during production.

The Three Elements of Impedance Matching

Successful impedance matching relies on the interaction of three fundamental elements:

Output Impedance (of the active driver component)

Characteristic Impedance (of the PCB trace itself)

Input Impedance (of the passive receiver component)

More Displays of Impedance Controlled PCB