Reciprocating Electroplating Nozzles for PCB Blind Spot Coverage
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Solution Overview
Problem
The conventional jet electroplating method for circuit boards results in blind spots due to fixed nozzles that limit the spraying range, leading to inadequate coverage and compromised electroplating quality.
Innovation Solution
An electroplating tank equipment with ejecting tubes that move back and forth horizontally, featuring misaligned nozzles and a circulation system to ensure comprehensive spraying of the electroplating solution over the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed nozzles are used to spray electroplating solution, then the device structure is simple, but the spraying range is limited and blind spots occur on the circuit board
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed nozzles into movable nozzles that can reciprocate horizontally along guide rails. This dynamic configuration allows the nozzles to cover a wider spraying range and eliminate blind spots on the circuit board, while the guide rails and driving mechanisms maintain the overall structural simplicity. The movable nozzles can adjust their positions to ensure comprehensive coverage of the electroplating solution across the entire circuit board surface.
2Device complexity
If fixed nozzles are used, then the device structure is simple, but the electroplating quality is compromised due to blind spots
Solution Approach 1:
The dynamics principle resolves this contradiction by enabling nozzles to move reciprocally along guide rails, ensuring that the entire circuit board surface receives uniform electroplating solution coverage. This eliminates blind spots that would otherwise compromise electroplating quality, while the guide rail system and simple driving mechanism preserve structural simplicity. The movable configuration allows precise control of spray coverage across the circuit board surface.
Solution Approach 2:
The patent applies segmentation by dividing the circuit board into multiple spray zones covered by multiple nozzles arranged in arrays. Each nozzle or group of nozzles can be independently controlled to cover specific areas, ensuring comprehensive coverage without gaps. This segmented approach maintains device simplicity while significantly improving electroplating quality by eliminating blind spots through coordinated spray coverage across multiple zones.
3Area of stationary object
If nozzles move back and forth to increase spraying range, then the spraying coverage is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamics with a straightforward reciprocating mechanism where nozzles move back and forth horizontally along guide rails. This simple dynamic system expands the spraying range to cover the entire circuit board while avoiding complex multi-axis motion systems. The guide rails provide constrained linear motion, and the driving mechanism uses basic actuators to achieve the reciprocating motion, thereby increasing coverage without proportionally increasing device complexity.
Solution Approach 2:
The patent merges multiple functions into the movable nozzle assembly: the nozzles serve both as spray delivery devices and as moving components that define the spray coverage area. The guide rails simultaneously provide motion constraints and structural support. This merging of functions reduces the need for separate complex positioning systems, achieving expanded spraying range with minimal increase in overall device complexity.
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 solution ensures uniform coverage of the electroplating solution, effectively addressing blind spots and enhancing the overall electroplating quality by allowing the nozzles to spray the metal ions uniformly across the circuit board.
Implementation Method 1
jet electroplating method primarily involves directly spraying an electroplating solution containing metal ions from an electroplating tank onto a circuit board such that the circuit board is electroplated
Data Source
AI summary
An electroplating device includes a carrying module, a moving module, a driving module and ejecting tubes. The carrying module has a slide rail. The moving module has a first portion and a second portion. The first portion is movably disposed in the slide rail. The moving module is moved back and forth parallel to a length direction of the slide rail by the driving module. Opposite two ends of the ejecting tubes are respectively disposed on the first portion and the second portion. When the moving module is driven to move back and forth parallel to the length direction, the moving module drives the ejecting tubes to move back and forth as well. Each of the ejecting tubes has nozzles. The nozzles on the ejecting tube are misaligned with the nozzles on the other ejecting tube adjacent to the ejecting tube.


