| CPC H05K 1/181 (2013.01) [H05K 1/115 (2013.01); H05K 3/30 (2013.01); H05K 3/4644 (2013.01)] | 17 Claims |

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1. An electronic device, comprising:
electric components in an effective area; and
a retaining structure substantially surrounding a boundary of the effective area;
wherein the electronic device comprises a base substrate, and multiple conductive layer and multiple insulating layers alternately stacked on the base substrate;
the retaining structure is configured to enhance adhesion between conductive layers adjacent to each other in the electronic device;
the retaining structure comprises one or more retaining layers; and
a respective retaining layer of the one or more retaining layers is in direct contact with at least one insulating layer of the electronic device;
wherein the respective retaining structure comprises a respective ring substantially surrounding the effective area of the electronic device; and
the respective ring is a discontinuous ring substantially surrounding the effective area of the electronic device, the discontinuous ring comprising a plurality of segments.
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