PCBA Cartridge Chassis for Flexible PCB Assembly
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Solution Overview
Problem
The challenge in manufacturing printed circuit board assemblies (PCBAs) for storage devices with flexible connections is the imprecision caused by free-moving parts during automated assembly and the inefficient application of thermal interface materials (TIM), leading to handling difficulties and potential damage.
Innovation Solution
Introducing a space-defining element, such as a rigid chassis, to secure the PCBs in a fixed position, allowing for simplified assembly and precise application of TIM by maintaining the boards in a stable orientation, which can be achieved through various embodiments using fixed PCB spacers or support pillars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible connections are used to connect multiple PCBs, then adaptability and ease of assembly are improved, but manufacturing precision and stability deteriorate due to free-moving parts
Solution Approach 1:
The patent divides the PCBA into multiple segments (PCBs) connected by flexible cables, allowing each board to be independently positioned and secured to the chassis. This segmentation enables the flexible connection to adapt to different configurations while maintaining precision through individual board fixation.
Solution Approach 2:
The patent applies preliminary action by securing each PCB to the chassis before final assembly. The boards are fixed in predetermined positions using mounting features on the chassis, which eliminates movement during subsequent assembly steps and ensures manufacturing precision is maintained throughout the process.
2Ease of manufacture
If flexible connections are used to connect multiple PCBs, then ease of assembly is improved, but reliability deteriorates due to free-moving parts causing unpredictable handling
Solution Approach 1:
The patent secures each PCB to the chassis in advance before final assembly operations. This preliminary fixation eliminates unpredictable movement during handling, testing, and TIM application, thereby improving reliability while maintaining the ease of assembly provided by flexible connections.
Solution Approach 2:
The chassis serves as an intermediary structure that mediates between the flexible PCB connections and the final assembly requirements. By providing fixed mounting points for each PCB, the chassis stabilizes the otherwise mobile assembly, ensuring reliable handling and positioning throughout the manufacturing process.
3Adaptability or versatility
If multiple PCBs are freely movable, then adaptability is improved, but device complexity increases due to difficulty in automated assembly and TIM application
Solution Approach 1:
The patent segments the PCBA into individually mountable PCBs that can be independently secured to the chassis. This segmentation allows each board to be positioned and fixed separately, simplifying automated assembly processes and TIM application while maintaining the adaptable flexible connection configuration.
Solution Approach 2:
The chassis acts as an intermediary platform that simplifies the complex assembly of multiple flexible PCBs. By providing a rigid structure with predetermined mounting features, the chassis reduces assembly complexity while preserving the adaptable configuration capabilities of the flexible connection system.
Data Source
AI summary
A memory cartridge for use during assembly of a storage drive apparatus. The memory cartridge includes a first memory printed circuit board (PCB). The memory cartridge also includes a second memory PCB, where the second memory PCB is operatively coupled to the first memory PCB by a first flexible connection. The memory cartridge also includes a chassis configured to fasten to the first memory PCB and to the second memory PCB such that the first and second memory PCBs have a spaced relationship to each other, and where the spaced relationship defines a gap.