1. A method of producing a light source compensating element for an image reading apparatus, the image reading apparatus including a light-radiating device for emitting an illuminating light to a scanned object, said method comprising:
providing a target film and a characteristic curve of said target film, said characteristic curve shows transmittance of said target film after being exposed versus light brightness exposing said target film;
determining a required transmittance distribution on said target film in accordance with a first brightness distribution and a second brightness distribution; wherein said first brightness distribution is the brightness distribution of the illuminating light projected directly from the light-radiating device onto the scanned object, and said second brightness distribution is a predetermined brightness distribution desired to be formed onto the scanned object;
exposing said target film by a light source with adjustable brightness, wherein the brightness of said light source is adjusted with reference to said characteristic curve to expose said target film, so that said target film have said required transmittance distribution; and
developing said target film to form said light source compensating element.
2. The method as claimed in claim 1, wherein said characteristic curve is obtained by the following steps:
providing a reference film and a light source with adjustable brightness, said reference film has identical characteristics as said target film;
changing the brightness of said light source when exposing different areas of said reference film;
developing said reference film; and
measuring transmittance of said different areas of said reference film, thereby obtaining said characteristic curve.
3. A method of producing a light source compensating film for a scanner, the light source compensating film disposed between a light source of the scanner and the surface of an object such that the light source emitting light onto the scanning line of the surface of the object through the light source compensating film has a predetermined brightness distribution, the method comprising the steps of:
providing a first film and a characteristic curve thereof, the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source after the first film is exposed and developed;
providing a second film identical to the first film to produce the light source compensating film;
determining the required transmittance distribution of the light source compensating film on the scanning line according to the predetermined brightness distribution formed on the scanning line of the surface of the object and the brightness distribution of the light from a light-radiating device, the light directly projected onto the scanning line;
changing the brightness of an adjustable and uniform light source to expose the light source compensating film according to the required transmittance distribution of the light source compensating film on the scanning line and the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source; and
developing the exposed light source compensating film to make the light source compensating film obtain the predetermined transmittance distribution.
4. The method of producing a light source compensating film as claimed in claim 3, wherein the characteristic curve is obtained by the steps of:
providing a uniform light source with adjustable brightness and changing the brightness thereof to expose different areas of the first film under a predetermined time period; and
developing the exposed first film regularly to obtain the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source.
5. A method of producing a light source compensating film for a scanner, the light source compensating film disposed between a light source of the scanner and the surface of an object such that the light source emitting light onto the scanning line of the surface of the object through the light source compensating film has a predetermined brightness distribution, the method comprising the steps of:
providing a first film and a characteristic curve thereof, the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source after the first film is exposed and developed;
providing a second film identical to the first film to produce a target film;
determining the required transmittance distribution of the light source compensating film on the scanning line according to the predetermined brightness distribution formed on the scanning line of the surface of the object and the brightness distribution of the light from a light-radiating device, the light directly projected onto the scanning line;
changing the brightness of an adjustable and uniform light source to expose the target film according to the required transmittance distribution of the light source compensating film on the scanning line and the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source; and
developing the exposed target film and disposing the developed target film between a uniform light source and the second film to produce the light source compensating film by means of controlling the brightness of the uniform light source and exposing time period.
6. The method of producing a light source compensating film as claimed in claim 5, wherein the characteristic curve is obtained by the steps of:
providing a uniform light source with adjustable brightness and changing the brightness thereof to expose different areas of the first film under a predetermined time period; and
developing the exposed first film regularly to obtain the characteristic curve showing transmittance of the first film versus the brightness distribution of the light source.
7. The method of producing a light source compensating film as claimed in claim 5, further comprising a step of:
using a uniform light source to pass through the exposed target film to expose a great number of films, whereby a great number of light source compensating films can be duplicated.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of fabricating a conducting crossover structure for a power inductor, the method comprising:
to form the conducting crossover structure:
stamping a first lead frame to define a first terminal and a second terminal;
stamping a second lead frame to define a first terminal and a second terminal;
locating an insulating material between and in contact with the first lead frame and the second lead frame to form a laminate; and
positioning the conducting crossover structure in a cavity of the power inductor,
wherein the first terminal and the second terminal of the first lead frame are located at first opposite diagonal corners of the laminate and the first terminal and the second terminal of the second lead frame are located at second opposite diagonal corners of the laminate.
2. The method of claim 1, further comprising:
connecting the first terminal of the first lead frame to the second terminal of the second lead frame; and
connecting the second terminal of the first lead frame and the first terminal of the second lead frame to a chip.
3. The method of claim 1, wherein the first lead frame and the second lead frame include copper.
4. The method of claim 2, wherein:
stamping a distance of approximately \xbd of a thickness of the laminate from a first side of the laminate to define the first terminal and the second terminal of the first lead frame; and
stamping a distance of approximately \xbd of the thickness of the laminate from a second side of the laminate to define the first terminal and the second terminal of the second lead frame.
5. The method of claim 1, wherein locating the insulating material between and in contact with the first lead frame and the second lead frame includes at least one of coating, spraying, applying, and attaching the insulating material.