Embedded Inductor Barrier Layers for Stable Substrate Plating
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Solution Overview
Problem
The integration of solid state magnetic materials like iron, nickel, and rare-earth metals into electronic substrates for inductors is hindered by their incompatibility with traditional plating chemistries, leading to leaching issues that affect the quality and stability of the plating process.
Innovation Solution
Incorporating a barrier layer, such as titanium, polymeric, or nitride materials, to prevent magnetic material leaching during plating, along with a plating seed layer and conductive fill material, to ensure the integrity and compatibility of the magnetic material within the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid state magnetic materials are integrated into electronic substrates to improve inductor performance, then inductor performance increases, but magnetic material leaching into plating chemistries occurs
Solution Approach 1:
A barrier layer is introduced as an intermediary between the magnetic material and the plating chemistry. This barrier layer prevents direct contact and chemical interaction between the magnetic material and plating solutions, thereby eliminating leaching while allowing the magnetic material to maintain its inductor performance function.
Solution Approach 2:
The structure is segmented into distinct layers: the magnetic material layer is separated from the plating chemistry by an intermediate barrier layer. This segmentation isolates the magnetic material from harmful chemical environments while maintaining its functional integrity for inductor operation.
2Ease of manufacture
If traditional plating chemistries are used for manufacturing, then manufacturing process is simple, but magnetic material leaching affects plating quality and stability
Solution Approach 1:
The barrier layer is formed prior to the plating process as a preliminary protective measure. This pre-established barrier prevents magnetic material leaching during subsequent plating operations, ensuring plating quality and stability without requiring modifications to the plating chemistry itself.
3Speed
If magnetic materials are embedded in electronic substrates to support faster integrated circuit devices, then circuit speed increases, but plating chemistry stability deteriorates
Solution Approach 1:
The barrier layer serves as a protective intermediary that isolates the magnetic material from the plating chemistry. This prevents chemical interactions and leaching that would otherwise destabilize the plating chemistry, allowing high-speed circuits to be manufactured with stable plating processes.
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 solution effectively prevents magnetic material leaching, maintaining the quality and stability of the plating process while ensuring the performance and integration of magnetic materials in electronic substrates for advanced integrated circuit devices.
Implementation Method 1
a barrier layer on the magnetic material layer, wherein the barrier layer prevents the magnetic material from leaching into plating solutions
Implementation Method 2
inductors are passive electrical components that store energy in a magnetic field generated by a magnetic material
Implementation Method 3
solid state magnetic materials comprising iron, nickel, cobalt, and rare-earth metals
Data Source
AI summary
An electronic substrate may be fabricated by forming a base substrate and forming an inductor extending through the base substrate, wherein the inductor includes a magnetic material layer and a barrier layer, such that the barrier layer prevents the magnetic material layer from leaching into plating solutions during the fabrication of the electronic substrate. In one embodiment, the barrier material may comprise titanium. In another embodiment, the barrier layer may comprise a polymeric material. In still another embodiment, the barrier layer may comprise a nitride material layer. The inductor may further include a plating seed layer on the barrier layer and a conductive fill material abutting the plating seed layer.