Z-Directed Delay Line Components for PCB Signal Timing
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Solution Overview
Problem
Current printed circuit board (PCB) manufacturing faces challenges in achieving high component densities and frequencies of operation, particularly due to the complexity and time-consuming nature of embedding resistors between layers, which makes design changes difficult.
Innovation Solution
The introduction of Z-directed components, which include an insulative body with a signal conductor and conductive traces, allowing for insertion into a PCB after assembly, enabling higher frequency operations and flexible circuit design without the need for complex layer embedding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resistive material is applied between copper traces after etching to embed resistors, then resistors can be placed on interior layers, but the manufacturing process becomes more time-consuming and design changes become difficult
Solution Approach 1:
The patent divides the resistor embedding process into separate modular components: a resistor component with conductive leads that can be inserted into drilled holes through the PCB layers. This segmentation allows the resistor to be installed as a discrete component rather than requiring complex post-etch material application, enabling easier design changes and reduced manufacturing time.
Solution Approach 2:
The patent transitions from planar resistor embedding (on the surface or within copper layers) to three-dimensional insertion through the PCB thickness (Z-direction). By drilling holes through the board and inserting resistor components vertically, the design enables flexible placement on interior layers without complicating the surface manufacturing process, thus improving adaptability while maintaining ease of manufacture.
2Productivity
If component densities are increased and higher frequencies are used, then circuit performance improves, but circuit design becomes very difficult to achieve
Solution Approach 1:
The patent utilizes the Z-dimension (vertical direction) by inserting component leads through holes perpendicular to the PCB surface. This allows components to be positioned on interior layers and connected through the board thickness, enabling higher component density without increasing surface complexity. The vertical insertion path simplifies routing and reduces the difficulty of achieving high-density, high-frequency circuit designs.
Data Source
AI summary
A Z-directed signal delay line component for insertion into a printed circuit board while allowing electrical connection to internal conductive planes contained with the PCB. In one embodiment the Z-directed delay line component is housed within the thickness of the PCB allowing other components to be mounted over it. The delay line embodiments include a W-like line and a plurality of spaced apart, semi-circular line segment connected such that current flow direction alternates in direction between adjacent semi-circular line segments, each of which in other embodiments can be varied by use of shorting bars. Several Z-directed delay line components may be mounted into a PCB and serially connected to provide for longer delays. The body may contain one or more conductors and may include one or more surface channels or wells extending along at least a portion of the length of the body.