76‐1: <i>Invited Paper:</i> Electroforming Fine‐Metal Mask for High‐Resolution OLED Displays

Chen, Xialing; Pan, TK; Xu, Wei

doi:10.1002/sdtp.14074

Symp Digest of Tech Papers

2020

DOI: 10.1002/sdtp.14074

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76‐1: Invited Paper: Electroforming Fine‐Metal Mask for High‐Resolution OLED Displays

Xialing Chen¹,

TK Pan²,

Wei Xu³

Abstract: The manufacturing of high definition OLED displays is limited by the resolution of the metal mask used in the OLED deposition process. We have developed the electroforming methods to make masks of 800 PPI and above.

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Cited by 6 publications

(2 citation statements)

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“…6 For rolled Invar alloy film, it was difficult to obtain higher resolution than quarter high definition (QHD) because the thickness was difficult to reduce. 7,8 Compared with other fabrication techniques for Invar alloy films, the electrodeposition method was simple and less expensive. 9 In addition, it offered the possibility of more accurate processing with better mechanical properties and thermal dimensional stabilities.…”

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confidence: 99%

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Fabrication of Large-Sized Invar Alloy Film with Low Thermal Expansion by Pulse Reverse Electrodeposition

Yu,

Zhong,

et al. 2023

J. Electrochem. Soc.

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Invar alloy film with low thermal expansion is a key substrate for high-resolution organic light-emitting diodes (OLEDs). The preparation of Invar alloy film by electrodeposition has attracted increasing attention due to its low cost and simple process. In this work, a large-sized (8×10 cm) uniform Fe-Ni alloy film was fabricated by pulse reverse electrodeposition. The effects of the electrodeposition parameters on the chemical composition and microstructure of Fe-Ni alloy films were investigated. Results showed that greater Ni2+/Fe2+ in the electrolyte, lower pulse frequency (f), smaller reverse pulse coefficient (x), and lower electrodeposition temperature (T) favored the iron content. The Invar alloy film (64 wt.% Fe) was electrodeposited at T = 50°C, x = 0.2, f = 10 Hz, and Ni2+/Fe2+ = 1.9 when the average pulse current density was 30 mA/cm2. The structure of the film was composed of a mixture of fcc and bcc phases, where (110) and (111) preferential orientations were predominant. After heat treatment in H2 at 800°C for 120 min, the bcc phase transformed into the fcc phase, and the grain size increased (>2 μm). As a result, the coefficient of thermal expansion of the film decreased from 11×10-6 to 1.5×10-6/°C, which is close to the standard for commercial application

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confidence: 99%

“…However, the sizes of Invar alloy film produced by electrodeposition were small, typically ranging from 1 × 2 to 2 × 5 cm 2 . 4,5,8,11,12 There is still limited research on the preparation of large-size Invar alloy films by electrodeposition, which is necessary for OLED mask fabrication.…”

mentioning

confidence: 99%

Fabrication of Large-Sized Invar Alloy Film with Low Thermal Expansion by Pulse Reverse Electrodeposition

Yu,

Zhong,

et al. 2023

J. Electrochem. Soc.

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P‐30: High‐Color‐Consistency High‐PPI AMOLED

Wang

Huang

Yuan

et al. 2021

Symp Digest of Tech Papers

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High performance displays require high PPI and high aperture ratio. For high PPI, the gap between two different colors need to be reduced. However, the smaller gap also results in lateral current leakage, brightness shortage and color shift. In this paper, a method is proposed to improve brightness shortage and color shift and results in high color consistency and good color detail, especially at low gray.

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10.1: Invited Paper: High Uniformity High Color Performance AMOLED Display in Mobile Phone Application

Wang

Zhang

et al. 2021

Symp Digest of Tech Papers

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76‐1: Invited Paper: Electroforming Fine‐Metal Mask for High‐Resolution OLED Displays

Abstract: The manufacturing of high definition OLED displays is limited by the resolution of the metal mask used in the OLED deposition process. We have developed the electroforming methods to make masks of 800 PPI and above.

Cited by 6 publications

References 3 publications

Fabrication of Large-Sized Invar Alloy Film with Low Thermal Expansion by Pulse Reverse Electrodeposition

Fabrication of Large-Sized Invar Alloy Film with Low Thermal Expansion by Pulse Reverse Electrodeposition

P‐30: High‐Color‐Consistency High‐PPI AMOLED

10.1: Invited Paper: High Uniformity High Color Performance AMOLED Display in Mobile Phone Application

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