Patent ID: 11945195
Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  H  C | IPC B  C  H

Claim 0:
1. A water barrier laminate that includes a plurality of inorganic barrier layers and a plurality of water-trapping layers, and is used for preventing the water from permeating into a device, characterized in that:
said plurality of inorganic barrier layers include a first inorganic barrier layer, a second inorganic barrier layer and a third inorganic barrier layer, and said plurality of water-trapping layers include a first water-trapping layer and a second water-trapping layer;
said first to third inorganic barrier layers and said first and second water-trapping layers form a basic alternating layer structure in which the first inorganic barrier layer, the first water-trapping layer, the second inorganic barrier layer, the second water-trapping layer and the third inorganic barrier layer are arranged in this order from the side facing the device to the outer side;
a water-permeable underlying plastic layer is provided on one side of at least one of said first to third inorganic barrier layers;
a distance L1a between said first water-trapping layer and said first inorganic barrier layer and a distance L2a between said second water-trapping layer and said second barrier satisfy the conditions represented by the following formulas (1) and (2):

L1a<3 μm  (1)

L2a<3 μm  (2), and
a distance L1b between said second inorganic barrier layer and said first water-trapping layer is set to satisfy the condition represented by the following formula (3):

L1b>3 μm  (3), by interposing a water-permeable organic layer between these two layers.