Liquid Ejection Head Chip Alignment via Inter-Chip Reference Marks
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Solution Overview
Problem
Existing liquid ejection heads with multiple device chips arrayed in a line face challenges in accurate positioning due to the inability to dispose reference marks on the channel molding's array axis, leading to potential inaccuracies in chip alignment.
Innovation Solution
A liquid ejection head design featuring a base plate with first reference marks and device chips with second reference marks, where spaces are formed between adjacent device chips to allow the reference marks to be aligned on the array axis, facilitating precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If device chips are arrayed in a line with no clearance therebetween, then the print width is increased, but the positioning accuracy of adjacent chips deteriorates
Solution Approach 1:
The invention introduces spaces between adjacent device chips, segmenting the continuous array into discrete units. This segmentation allows reference marks to be positioned on the array axis without interference from adjacent chips, thereby maintaining positioning accuracy while preserving the extended print width achieved through multiple chips.
Solution Approach 2:
The space between adjacent device chips acts as an intermediary region that accommodates reference marks. These reference marks serve as mediators for the positioning process, enabling accurate alignment of device chips relative to the channel molding and to each other along the array axis, which would be impossible if chips were directly adjacent.
2Manufacturing precision
If reference marks are disposed on the channel molding's array axis, then the positioning accuracy is improved, but the device chip array configuration becomes more complex
Solution Approach 1:
By segmenting the device chip array with spaces between adjacent chips, the invention creates designated regions where reference marks can be disposed on the array axis. This segmentation approach maintains positioning accuracy while avoiding the complexity of trying to position reference marks on tightly packed or overlapping chip structures.
Data Source
AI summary
Provided is a liquid ejection head comprising a base plate and at least two device chips in which ejection ports for ejecting a liquid are formed and which are disposed on the base plate. At least one first reference mark is provided on the base plate. A second reference mark is provided on each of the device chips. At least one space is formed between adjacent ones of the device chips. The second reference marks and the first reference mark present in the space are disposed on an array axis along which the device chips are arrayed.