Abstract:
The present invention provides a cover film for a printed circuit board. The cover film includes an adhesive layer; a core layer made of a polymer; and a composite material layer formed on the core layer, comprising epoxy resin, a black material selected from the group consisting of a black pigment, carbon powder, nano carbon tube and a combination thereof, and an additive selected from the group consisting of titanium dioxide, boron nitride, barium sulfate and a combination thereof, wherein the core layer is disposed between the adhesive layer and the composite material layer, and the adhesive layer and the composite material layer have the same thickness or have a thickness difference being no more than 15 micro meters. The cover film of the preset invention is capable of shielding circuit patterns and has great folding endurance, and is thus applicable to flexible printed circuit boards.
Abstract:
The present invention provides a cover layer for a printed circuit board. The cover layer includes a first polymer layer, a second polymer layer and a light-reflecting layer disposed between the first and second polymer layers and having a thickness being 0.5 to 10 micro meters. Due to the light-reflecting layer, the cover layer of the present invention has high reflection rate and great flexibility suitable for a flexible printed circuit board.
Abstract:
A paper feeding device includes a cover, a base, a pickup roller assembly and at least one paper blocking unit. The paper blocking unit is placed beside the pickup roller assembly, has a paper blocking element and a projection projecting from the upper portion of the side wall of the pickup roller assembly. The paper blocking element includes a connecting portion, a paper blocking arm, a pivot rotatablely connecting the cover. A connecting arm extends upwards from the end of the pivot, a blocking portion projects from the outer side of the connecting arm, a passage is formed between the blocking portion and the connecting arm. The projection can be downward against the blocking portion of the paper blocking element or pass through the passage of the paper blocking element to allow the paper to be fed in, so the cooperation is easy, the paper feeding device works smoothly.
Abstract:
A micro USB plug includes a terminal seat and a terminal unit including two first terminals, two second terminals, and a third terminal. Each of the first, second, and third terminals extends into the terminal seat and has an extending segment formed with a contact projection, an inspection segment connected to the extending segment and having an inspection surface that is flush with a reference surface of the terminal seat and an abutting surface that abuts against the terminal seat, and a soldering segment extending from the inspection segment. The contact projections and the inspection segments of the first and third terminals extend in a same direction. The contact projections and the inspection segments of the second terminals extend in opposite directions. A segment length of the soldering segments of the first terminals differs from that of the soldering segment of the third terminal.
Abstract:
A system and a method for holographic storage mainly involve forming a holographic interference pattern in a holographic recording medium. The holographic storage system utilizes a light source to emit a coherent beam. The coherent beam is irradiated to a first reflector to form a divergent beam. The divergent beam is then irradiated to a second reflector to form collimating beams (a signal beam and a reference beam). The signal beam goes through a spatial light modulator (SLM) and is modulated by the SLM. After that, the reference beam and the modulated signal beam are irradiated to a convergent unit, and are directed to the holographic recording medium for forming the holographic interference pattern. The holographic storage system that the light source is split into a signal beam and a reference beam by a set of reflectors according to the reflection principle without involving refraction may employ wavelength multiplexing.
Abstract:
A container comprises a first cover and a second cover, in which the first cover comprises an internal space. The container further comprises a plate disposed on the second cover. The second cover is provided with at least one first foolproof device, while the plate is provided with at least one second foolproof device. When the second foolproof device is engaged with the first foolproof device, the plate and the second cover are generally fixedly positioned with respect to each other.
Abstract:
A holographic storage and regeneration system includes a holographic recording medium, a light source, a spatial light modulator, and a conjugate servo light guidance portion. The light source generates a signal light and a reference light. The spatial light modulator modulates the incident signal light and makes it incident onto the medium along the incident direction of the signal light. The guidance portion guides a reference light to incident onto the medium in one direction and reflects it in another direction. A reference light and a signal light interfere with each other to produce a holographic interference fringe. The reflected reference light is guided into a first image sensor to be used to analyze the incident angle of the reference light. When the reference light incidents onto the fringe of the medium through the guidance portion in a reverse direction relative to another direction, a conjugate regenerated light is generated.
Abstract:
An optical storage system for storing data in an optical medium comprises an initial light source, a first sheet, a light modulator and a second sheet. The initial light source provides an initial light beam. The first sheet comprises a first surface and a second surface, wherein the initial light beam is partially reflected on the first surface to act as a reference beam, and the initial light beam partially passes the first surface, reflected on the second surface to act as a signal beam. The light modulator provides a pattern, wherein the signal beam contacts the light modulator. The second sheet comprises a third surface and a fourth surface, wherein the reference beam is reflected toward the optical medium on the third surface, the signal beam is reflected toward the optical medium on the fourth surface, and the reference beam and the signal beam interfere with each other to store the pattern into the optical medium.
Abstract:
A system and method for recording and reproducing holographic interferogram with servo is provided. A servo process is provided by the system and method to continuously recording a holographic interferogram in a holographic recording medium with servo trace layers. By the servo process, reproducing signals are captured rapidly and correctly. Also, by the servo process, the intensity distribution of a reference beam is monitored, which is reflected by a reflecting mirror disposed on the other side of the holographic recording medium and transmits the holographic recording medium. By analyzing the distribution, one can adjust the distance and the incidence angle between the reflection mirror and the reference beam. Moreover, a plurality of servo tracks at different layer is provided for recording the holographic interferogram at different layers of holographic recording medium.