SMT Component Through-Void Encapsulation for Precise Alignment
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Solution Overview
Problem
Existing electronic devices using surface mount technology (SMT) face challenges in accurately positioning and confining electronic components relative to electrical contacts on carrier substrates, leading to potential misalignment and unreliable connections.
Innovation Solution
The proposed electronic device incorporates an encapsulation block with a through-void that confines and orients electronic components, allowing for precise placement and connection via solder bumps or pads, ensuring correct alignment and secure electrical contact with the carrier substrate's electrical contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electronic components are mounted on the carrier substrate without a through-void structure, then the manufacturing process is simpler, but the positioning precision and alignment accuracy of electronic components deteriorate
Solution Approach 1:
The encapsulation block is segmented to include a through-void that extends from the front face to the back face, creating distinct functional zones: the through-void for component placement and the surrounding encapsulation material for protection and structural support. This segmentation enables precise positioning while maintaining manufacturing feasibility.
Solution Approach 2:
The through-void acts as an intermediary structure between the electronic component and the carrier substrate. It provides a confined space that mediates the positioning relationship, ensuring accurate alignment of the electronic component with the electrical contacts on the carrier substrate while simplifying the overall mounting process.
2Manufacturing precision
If electronic components are placed without confinement structure, then the assembly process is faster, but the alignment accuracy with electrical contacts deteriorates
Solution Approach 1:
The through-void is pre-formed in the encapsulation block before electronic component placement. This preliminary action creates a ready-made confinement structure that guides component positioning, eliminating the need for complex alignment procedures during assembly and thereby maintaining high assembly speed while ensuring precise alignment.
Solution Approach 2:
The through-void structure enables self-alignment of the electronic component during placement. The physical constraints of the through-void automatically guide the component into the correct position relative to the electrical contacts, eliminating the need for external alignment tools or complex positioning mechanisms, thus maintaining high assembly productivity.
3Strength
If the encapsulation block is made solid without through-void, then the structural strength is higher, but the positioning capability of electronic components deteriorates
Solution Approach 1:
The encapsulation block exhibits local quality variation: the majority of the block is solid encapsulation material providing structural strength and protection, while a specific local region (the through-void) is hollow to provide positioning capability. This local differentiation allows the structure to simultaneously achieve high strength and effective component positioning.
Solution Approach 2:
The electronic component is nested within the through-void of the encapsulation block, which itself is nested within the larger encapsulation structure. This nested arrangement allows the component to be positioned and confined in the through-void while the surrounding encapsulation material provides the necessary structural strength and protection.
Data Source
AI summary
An electronic device includes a carrier substrate with an electronic IC chip mounted on top of the carrier substrate. An encapsulation block on top of the front face of the carrier substrate embeds the IC chip. The encapsulation block has a through-void for positioning and confinement that extends through the encapsulation block to the top of the carrier substrate. At least one electronic component is positioned within the through-void and mounted to the top of the carrier substrate. Solder bumps or pads are located within the through-void to electrically connect the at least one electronic component to the carrier substrate.