Wafer level lens, lens sheet

Abstract

A lens sheet including a first transparent substrate, a first lens film, a second lens film, a second transparent substrate, a plurality of bonding material patterns and a plurality of buffer cavities is provided. The first lens film is disposed on the first transparent substrate, and having a plurality of first lens portions and a plurality of first carrying portions. The second lens film is disposed between the second transparent substrate and the first lens film. The bonding material patterns are disposed between the second lens film and the first carrying portions. The buffer cavities are located between the first carrying portions and the first lens portions.

What is claimed is: 
     
         1 . A lens sheet, comprising:
 a first transparent substrate;   a first lens film, disposed on the first transparent substrate, and having a plurality of first lens portions and a plurality of first carrying portions;   a second lens film;   a second transparent substrate, wherein the second lens film is disposed between the second transparent substrate and the first lens film;   a plurality of bonding material patterns, disposed between the second lens film and the first carrying portions; and   a plurality of buffer cavities, located between the first carrying portions and the first lens portions.   
     
     
         2 . The method of manufacturing the lens sheet as claimed in  claim 1 , wherein the first lens film further has a plurality of first connecting portions, the first connecting portions are connected to the first lens portions and the first carrying portions, and the buffer cavities are formed within the first connecting portions. 
     
     
         3 . The method of manufacturing the lens sheet as claimed in  claim 1 , wherein each of the first lens portions is surrounded by one of the buffer cavities, and each of the buffer cavities is surrounded by one of the first carrying portions. 
     
     
         4 . The method of manufacturing the lens sheet as claimed in  claim 3 , wherein each of the buffer cavities is an annular trench. 
     
     
         5 . A wafer-level lens, comprising:
 a first transparent substrate;   a first lens film, disposed on the first transparent substrate, and having a first lens portion and a first carrying portion;   a second lens film;   a second transparent substrate, wherein the second lens film is disposed between the second transparent substrate and the first lens film;   a bonding material pattern, disposed between the second lens film and the first carrying portion; and   a buffer cavity, located between the first carrying portion and the first lens portion.   
     
     
         6 . The wafer-level lens as claimed in  claim 5 , wherein the first lens film further has a first connecting portion, the first connecting portion is connected to the first lens portion and the first carrying portion, and the buffer cavity is formed within the first connecting portion. 
     
     
         7 . The wafer-level lens as claimed in  claim 5 , wherein the first lens portion is surrounded by the buffer cavity, and the buffer cavity is surrounded by the first carrying portion. 
     
     
         8 . The wafer-level lens as claimed in  claim 7 , wherein the buffer cavity is an annular trench.