Semiconductor Package Insert With Independent Latch Mechanism
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Solution Overview
Problem
Conventional semiconductor package inserts apply excessive mechanical stress, potentially damaging soft BGA packages during loading due to the need for strong downward force to open latches, which is not suitable for packages with flexible substrates or soft resin encapsulants.
Innovation Solution
An insert with an independently movable latch mechanism, featuring a slanted latch with a guide hole and elastic components, allowing for independent operation of the latch and reduced force requirement, which minimizes stress on semiconductor packages during loading and prevents damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a strong downward force is applied to open the latch by pushing both the latch and button, then the latch can be opened to load the semiconductor package, but significant mechanical stress is applied to the semiconductor package which may cause damage
Solution Approach 1:
The latch mechanism is divided into two independent parts: the button (140) for actuation and the latch (130) for locking. The button can be pressed independently to release the latch without requiring forceful downward pushing that would stress the semiconductor package. This segmentation allows the button to serve as a force application point that decouples the opening operation from the package.
Solution Approach 2:
The button (140) acts as an intermediary element between the operator and the latch (130). Instead of directly pushing the latch and semiconductor package assembly downward, the operator presses the button which then triggers the latch release mechanism. This intermediary transfers the opening force through a different mechanical path that avoids applying stress to the semiconductor package.
2Stability of the object's composition
If the latch has a slanted surface protruding into the pocket to catch the semiconductor package, then the package can be stably loaded, but a strong force is required to push the latch and button downward to open it
Solution Approach 1:
The catching function and the locking function are separated into different components. The slanted surface of the latch (130) provides the catching function for stable package loading, while the button (140) provides the actuation function for opening. This allows the latch to maintain its slanted catching surface without requiring strong downward force to open, as the button independently handles the opening action.
3Ease of operation
If the button is connected to the latch by a moving shaft pin that moves along a guide hole, then the button converts press plate movement into rotational movement of the latch, but the guide hole needs a correction space to permit independent latch rotation
Solution Approach 1:
The guide hole (35) is designed with a correction space that allows the moving shaft pin (43) to move dynamically within the guide hole as the latch rotates. This dynamic design enables the latch to rotate independently about the fixed shaft pin (31) while the button follows the guided path, accommodating the changing relative positions during the opening/closing cycle without requiring overly complex constraints.
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
Enables secure and damage-free loading of both hard and soft semiconductor packages by allowing the latch to be opened with a pressurizing force that is gentle enough not to harm the package, ensuring stable electrical contact without damaging the package.
Implementation Method 1
an elastic body may be located between a back of the latch having the guide hole and the insert body near to the side of the latch, such that the elastic body applies an elastic force to a latch so as to cause the latch to protrude into the pocket
Implementation Method 2
A button connected to the latch by a moving shaft pin may be elastically coupled between the latch and the press plate, the button projecting upwards from the insert body and converting the movement of the press plate into rotational movement of the latch by causing the moving shaft pin to move along the guide hole
Data Source
AI summary
In an example embodiment, an insert having an independently movable latch mechanism for loading a semiconductor package may include an insert body having a pocket, latch units installed at opposite sides of the pocket, and a press plate elastically installed above the insert body. The latch units prevent a loaded semiconductor package from escaping out of the pocket. The press plate may operate the latch unit by movement relative to an upper surface of the insert body. Each latch may be movably connected to the insert body such that a first end of the latch is rotatable around a fixed shaft pin. A second end of the latch may be movable into and out of the pocket. The latch may have a front surface slanted downwards towards the center of the pocket and have a guide hole near the back surface, opposite the front surface. A button connected to the latch by a moving shaft pin may be elastically coupled between the latch and the press plate, the button projecting upwards from the insert body and converting the movement of the press plate into rotational movement of the latch by causing the moving shaft pin to move along the guide hole. The movement of the shaft pin rotates the latch about the fixed shaft pin. The guide hole includes a guide hole correction space that permits movement of the moving shaft pin into the guide hole correction space such that the latch rotates about the fixed shaft pin independent of the movement of the press plate. An elastic body may be located between a back of the latch having the guide hole and the insert body near to the side of the latch, such that the elastic body applies an elastic force to a latch so as to cause the latch to protrude into the pocket.