FIELD: chemistry.
SUBSTANCE: invention provides a product having a solid envelope with a pair of sides which are connected, at a distance from each other, to an outer layer to form a backstrap, wherein a thin-film protective device is placed on a region for accommodating one of the sides of the envelope and on an inner layer. According to one aspect, one side of the envelope is a layered material from a pair of opposite sheets for accommodating the thin-film protective device in between without surface indication of the presence of the thin-film protective device. According to another aspect, the thin-film protective device, which is connected to the surface of the side of the envelope, is concealed under the inner or outer layer.
EFFECT: easier manufacture.
22 cl, 19 dwg
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| ALBUM FOR IMAGES | 2013 |
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