Fluid Discharge Head With Air Suction to Prevent Drooling
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Solution Overview
Problem
The existing solder bump forming devices using the IMS method face issues with drooling of molten solder after forming a solder bump, leading to undesirable bridges and increased time requirements for temperature control, which hinders efficiency.
Innovation Solution
A fluid application device that controls pressure by switching between positive and negative pressure using a pressure sensor and control device to prevent leakage and drooling, allowing rapid manipulation of the discharge head's position and fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common inkjet head is used for dispensing adhesive, then the device complexity is low, but the adhesive is discharged in a spray state causing contamination and requiring masking
Solution Approach 1:
The inkjet head is divided into multiple independent nozzle units, each capable of being selectively activated. This segmentation allows precise control over which nozzles discharge adhesive, enabling direct application to specific target positions without spraying adhesive to surrounding areas, thereby eliminating the need for masking while maintaining relatively simple device complexity.
2Productivity
If adhesive is discharged in a spray state, then the application speed is fast, but the adhesive spreads beyond the target position causing contamination
Solution Approach 1:
Each nozzle unit is designed with specific local characteristics including adjustable discharge amount and selective activation capability. The control unit enables individual nozzles to discharge adhesive in controlled amounts only when needed, allowing fast application speed through selective activation while preventing spread to non-target areas through precise local control of each nozzle's discharge characteristics.
3Area of stationary object
If multiple inkjet heads are arranged to cover wide areas, then the coating area is increased, but the number of clogged nozzles increases
Solution Approach 1:
The system dynamically controls the activation state of each nozzle unit based on real-time requirements. Instead of having all nozzles continuously active, the control unit selectively activates only the necessary nozzle units for the current dispensing task. This dynamic control reduces the effective number of nozzles exposed to adhesive, thereby reducing clogging incidents while maintaining the ability to cover wide areas by activating different nozzle units as needed.
4Area of stationary object
If a large number of nozzle units are used to cover wide areas, then the coating area is increased, but the device complexity increases
Solution Approach 1:
Each nozzle unit is designed as a universal module with identical structure and control interface. The same nozzle unit design can be replicated and arranged in various configurations to cover different area requirements. This modular universal design allows the system to expand coating area by adding identical modules rather than designing complex custom systems, thereby increasing area coverage while maintaining manageable device complexity through standardization.
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 drooling and significantly reduces standby time for temperature control, enhancing productivity by allowing rapid and reliable fluid management during the solder bump formation process.
Implementation Method 1
Each inkjet head includes a piezoelectric element and a discharge nozzle. The piezoelectric element is configured to generate pressure in response to an applied voltage to discharge fluid from the nozzle
Data Source
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AI summary
A defect may occur in which as the amount of fluid discharged by a fluid discharge device decreases, a mask is not filled with the fluid even when the fluid is discharged. In order to fill a workpiece with the fluid, it is necessary to replace air in the workpiece corresponding to a discharge part with the fluid. The air in the workpiece is removed in advance, thereby filling the workpiece with the discharged fluid. A fluid discharge device in which, at one end of a discharge head, a suction port for sucking air in the mask on the workpiece, and a fluid discharge device having a discharge nozzle formed thereon for discharging the fluid are formed is used.