Suppression of Capillary Flow in Slot-Die Coating for the Fabrication of Fine OLED Stripe
Bibliographic record
Abstract
Due to lateral and vertical capillary flows appearing in a slot-die head with μ-tip for fine line coating, line breakup occurs at a relatively low coating speed, making it difficult to narrow the stripe. Through computational fluid dynamics (CFD) simulations, we demonstrate that capillary flow can be substantially suppressed by increasing the contact angle of the head lip and forming the microscale groove patterns in the dual plate (shim and meniscus guide). It is shown that the corresponding contact angle of the groove patterns increases up to 120°. Based on the simulation results, we have coated the head lip with a hydrophobic material and embedded the dual plate with micropatterns fabricated by a laser cutter into the slot-die head. Using such a hydrophobic slot-die head, we can suppress the lateral capillary flow of an aqueous poly(3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS) to a great extent and, hence, increase the coating speed, rendering the stripe narrow (≈76 μm). To demonstrate its applicability to organic light-emitting diodes (OLEDs), we have also fabricated fine red, green, and blue OLED stripes and successfully achieved light emission from them with the emission area of 80 μm × 5 cm.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".