Multi-Head UV Laser Drilling for High-Precision FPC Throughput
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Solution Overview
Problem
Current single-head laser drilling technologies are inefficient in processing flexible printed circuit (FPC) boards, which require high precision and small diameter holes, failing to meet market demands for speed and efficiency.
Innovation Solution
A multi-head FPC ultraviolet laser drilling device with a body frame, support frame, movement assemblies along X, Y, and Z axes, suction parts with negative pressure suckers, and drilling assemblies equipped with pulse ultraviolet laser devices, allowing simultaneous processing of multiple FPC boards with precise positioning and efficient hole drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single head laser drilling is used, then device complexity is reduced, but productivity is insufficient
Solution Approach 1:
The drilling system is divided into multiple independent drilling heads (first drilling head, second drilling head, etc.), each capable of independent operation. Each drilling head includes its own laser device and movement assembly, allowing parallel processing of multiple FPC boards simultaneously, thereby significantly improving productivity while maintaining manageable complexity through modular design
Solution Approach 2:
Multiple drilling heads are combined into a single integrated device that shares common structural components such as the body frame, support frame, and control system. The drilling heads are arranged in parallel and can process multiple boards simultaneously, merging the functionality of multiple single-head devices into one unified system that achieves higher productivity
2Manufacturing precision
If mechanical drilling is used, then device complexity is low, but manufacturing precision is insufficient for small diameter holes
Solution Approach 1:
The patent replaces traditional mechanical drilling systems with ultraviolet laser drilling technology. The laser device emits ultraviolet light that directly ablates the FPC board material to create precise small diameter holes, eliminating mechanical contact and achieving superior drilling precision for fine-pitch FPC applications where mechanical drilling cannot meet the required tolerances
Solution Approach 2:
The system uses ultraviolet laser wavelength (a specific parameter of light) instead of mechanical force, and controls the laser power, pulse duration, and scanning speed to achieve precise control over hole diameter and depth. By adjusting these laser parameters, the system can drill holes with diameters as small as a few micrometers with high precision, far exceeding mechanical drilling capabilities
3Productivity
If multi head processing is implemented, then productivity is improved, but device complexity increases
Solution Approach 1:
The multi-head drilling device is segmented into modular drilling head units, where each head is a self-contained module with its own laser device and movement assembly. This modular segmentation allows the system to process multiple boards in parallel while keeping each individual component relatively simple and manageable, reducing the overall complexity increase that would result from a fully integrated multi-functional system
Solution Approach 2:
Multiple drilling heads are designed with identical or similar structures that can process different types of FPC boards. The drilling heads can be configured to handle various board sizes and drilling requirements, providing universal functionality across the multi-head system. This universality reduces complexity by using standardized components rather than custom-designed elements for each head
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 multi-head system significantly enhances processing efficiency by enabling simultaneous drilling of multiple FPC boards, improving fixating and disassembling convenience, and accommodating boards of varying sizes, thereby reducing processing time and costs.
Implementation Method 1
a suction assembly, including suction parts, the first driving parts being slidably connected to the suction parts respectively, the suction parts being configured to fix one or more FPC boards
Implementation Method 2
a drilling assembly, including drilling parts, the drilling parts being fixed on the third movement assembly, and the drilling parts being arranged corresponding to the one or more FPC boards and being configured to drill the one or more FPC boards
Data Source
AI summary
A multi head flexible printed circuit (FPC) ultraviolet laser drilling device and a using method thereof are provided, the device includes a body frame; a support frame connected to the body frame; a first movement assembly disposed on the body frame and configured to move along a Y-axis direction of the body frame; a second movement assembly disposed on the support frame and configured to move along an X-axis direction of the body frame; a third movement assembly disposed on the second movement assembly and configured to move along a Z-axis direction of the body frame; a suction assembly slidably connected to the first movement assembly and configured to fix one or more FPC boards; and a drilling assembly including drilling parts. The device can realize the simultaneous processing of FPC board by adopting two or more processing modes, thereby improving the processing efficiency.