发明名称 |
Optically Variable Security Device |
摘要 |
A method of forming a security device comprises: a) providing an undeveloped photoresist layer on an electrically conductive layer; b) forming a first diffractive pattern in the undeveloped photoresist layer using optical-interferometry; c) forming a second diffractive pattern in the undeveloped photoresist layer using electron beam lithography; and d) thereafter developing the photoresist layer. |
申请公布号 |
GB0601093(D0) |
申请公布日期 |
2006.03.01 |
申请号 |
GB20060001093 |
申请日期 |
2006.01.19 |
申请人 |
LA RUE INTERNATIONAL, DE LIMITED |
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