Conductive Solder Ball Container with Inner Plug
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Solution Overview
Problem
Existing containers for small solder balls face issues with deformation due to lid movement during conveyance and electrostatic adsorption, leading to sphericity deterioration and attachment to container surfaces, making it difficult to close the lid and potentially deforming the solder balls.
Innovation Solution
A container design featuring a cylindrical body with a conductive lid and inner plug, where the lid has a screw groove and the inner plug is held by lock portions, ensuring secure closure and preventing electrostatic attachment through conductive surfaces, and a package with a deoxidizing and drying agent in an impermeable bag to prevent oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is made to cover the container opening, then the container is sealed, but the lid moves during conveyance and squashes the solder ball, causing deformation
Solution Approach 1:
The lid is divided into a lid body and a separate pressing-preventing member (protrusion) that extends into the container. This segmentation allows the lid body to provide sealing while the protrusion independently prevents solder ball deformation by occupying the gap between the lid body and container opening.
Solution Approach 2:
The pressing-preventing member (protrusion) acts as an intermediary element between the lid body and the solder ball. It mediates the interaction by physically blocking the lid body from contacting and deforming the solder ball, while still allowing the lid to seal the container.
2Reliability
If the container is closed with a lid, then the solder balls are protected, but electrostatically charged solder balls adsorb to the container opening end surface, making it difficult to close the lid
Solution Approach 1:
The conductive coating on the container opening end surface converts the harmful electrostatic attraction into a beneficial effect. By providing a conductive surface, any electrostatic charge on the solder balls is dissipated, preventing adsorption and making the lid easier to close, while still maintaining protection of the solder balls.
Solution Approach 2:
The electrical conductivity parameter of the container opening end surface is changed by applying a conductive coating. This parameter change eliminates electrostatic charge accumulation, preventing the solder balls from adsorbing to the surface and facilitating easy closing of the lid.
3Ease of operation
If the solder balls are exposed to atmosphere, then they are accessible for use, but the Sn in solder balls oxidizes, causing yellowing
Solution Approach 1:
The container provides an inert environment (atmosphere) that protects the solder balls from oxidation. By sealing the container, the solder balls are isolated from atmospheric oxygen, preventing the harmful oxidation reaction while remaining accessible when needed.
Solution Approach 2:
The protective environment is applied locally where needed - inside the container where the solder balls are stored. The container creates a localized inert atmosphere that protects only the solder balls, while the outside environment remains unchanged for accessibility.
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
The container effectively prevents deformation and electrostatic attachment of solder balls, ensuring precise mounting and maintaining sphericity, while the package prevents oxidation, maintaining the quality of the solder balls.
Implementation Method 1
at least an inner surface and an opening end surface of the container body have a conductive property
Implementation Method 2
a deoxidizing and drying agent arranged outside the containers is housed in a bag member together with the containers to be airtightly sealed
Data Source
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Figure 5
AI summary
To provide a container and a package configured to prevent a deformation of housed metal. According to one aspect of the present invention, there is provided the container. This container includes a cylindrical container body, a lid, and a flat plate-shaped inner plug. The cylindrical container body with a bottom has a sidewall and a bottom wall. The lid has a flat plate portion and a side portion. The flat plate portion covers an opening of the container body. The side portion covers at least a part of an outer peripheral surface of the container body. The flat plate-shaped inner plug is located inside the lid. The container body includes a thread ridge on the outer peripheral surface. The side portion of the lid has a screw groove with two or more threads on its inner peripheral surface. The lid is configured to be screwed with the container body by screwing the screw groove with the thread ridge. A plurality of lock portions are disposed on an outer periphery of the lid. The screw groove has the threads by a count identical to a count of the lock portions. The inner plug is held to an inside of the lid by each of the lock portions fitted into each inside of the screw grooves.