Stepped Stiffener Placement for VR Component Miniaturization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing size of voltage regulator (VR) components on printed circuit boards (PCBs) poses challenges for miniaturization due to their magnetic field interference, which restricts signal routing and requires larger PCB footprints, inhibiting device form-factor miniaturization and signal integrity for high-speed signals.
Innovation Solution
The direct placement of power delivery components like inductors and capacitors on a stepped stiffener reduces the need for PCB routing keep-out zones, allowing for more direct power delivery paths and improved signal integrity by using a stiffener member with vias and metallization layers to isolate VR components from signal paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If voltage regulator components are placed on the PCB, then power delivery performance is improved, but PCB footprint and layer count increase
Solution Approach 1:
The patent moves VR components from the traditional PCB plane to the vertical dimension by placing them on the top surface of the package substrate, which extends upward from the PCB. This three-dimensional placement allows power delivery components to be positioned above the signal routing layers, resolving the conflict between power delivery performance and PCB footprint by utilizing unused vertical space.
Solution Approach 2:
The patent introduces a package substrate as an intermediary platform between the PCB and the VR components. This intermediate layer provides a dedicated mounting surface for power delivery components, allowing them to be electrically connected to the PCB through vias while physically separated from the signal routing areas, thus improving power delivery without increasing PCB footprint.
2Area of stationary object
If signal routings are placed beneath VR components, then PCB real estate is reduced, but signal quality degrades due to magnetic field coupling
Solution Approach 1:
The patent relocates VR components to the vertical dimension (top surface of package substrate), creating physical separation between the magnetic field sources and the signal routing layers on the PCB. This spatial separation in the vertical dimension eliminates magnetic field coupling while still allowing signal routings to occupy the PCB real estate efficiently.
Solution Approach 2:
The patent extracts the VR components from the PCB plane and places them on a separate package substrate structure. This extraction removes the harmful magnetic field sources from the vicinity of signal routings, eliminating the need for keep-out zones and allowing signal quality to be maintained while maximizing PCB real estate utilization.
3Object-affected harmful factors
If keep-out zones are created around inductor components, then signal integrity is improved, but PCB footprint increases
Solution Approach 1:
The patent eliminates the need for horizontal keep-out zones by moving inductor components to the vertical dimension on the package substrate top surface. This positioning allows signal routing layers on the PCB to extend directly beneath the inductors without suffering from magnetic field coupling, thereby maintaining signal integrity while maximizing PCB footprint utilization.
Solution Approach 2:
The package substrate acts as an intermediary that physically separates the inductor components from the PCB signal routing layers. This intermediate structure allows the inductors to be positioned above the signal paths without creating harmful electromagnetic coupling, eliminating the need for keep-out zones and reducing PCB footprint.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables platform miniaturization, reduces PCB real estate, and enhances signal integrity for high-speed signals by eliminating electromagnetic interference from VR components, while maintaining effective power delivery performance.
Implementation Method 1
The presence of a VR component may affect the electrical properties of the PCB traces, which is an important consideration as electronic components continue to increase in speed. As a design 'rule of thumb', placing signal routings/traces immediately beneath the VR component in PCB is generally prohibited due to the significant noise coupling ascribed to the magnetic field (H-field)
Data Source
AI summary
According to various examples, a device is described. The device may include a stiffener member including a first step section and a second step section. The device may also include a plurality of vias extending from or through the stiffener member. The device may be coupled to a printed circuit board.