Image Sensor Camera Module

Amkor's Image Sensor Camera Module is a complete camera solution that integrates an image sensor chip with DSP, optics, passive components and flexible circuit. Using an advance manufacturing solution, Amkor enabled the integration of chip and wire assembly with the optics assembly. This provides our customers the low cost solution for a complete camera in a very small form factor. The Image Sensor Chip is processed at class 100 cleanroom to ensure cleanliness of the module. Amkor carefully designed all equipment and logistics to achieve optimum cleanliness. The Image Sensor Camera Module is a product of Amkor's years of assembly experience and technology leadership. Amkor utilizes its world class team of engineers from its worldwide Design and Development Center to develop a low cost camera module solution. Combining its expertise and experience in the strip laminate and image sensor assembly, Amkor has developed the laminate camera module. Amkor has invested resources and capital in the camera module business and owns several patents on the design and manufacturing of camera modules

Applications

With the cost reduction realized in integrating optics assembly with the chip and wire assembly, the Camera Module meets the needs of image sensor applications requiring a low cost small form factor solution. Current applications include cellphones, PDAs, computers, notebooks, automotive sensors, video phones, toy and games, security and Biometrics.

IR Glass Filter (Cut Filters)

IR cut filters are frequently used since they let the visual spectra pass while infrared rays from 780nm are blocked. The IR filters are used with CCD and CMOS imagers to produce true color images.

Typical Lens and IR Filter Characteristics (2P)

• Focal Length: 4.8 +/- 0.1 mm
• Aperture: 2.5 +/- 5%
• Angle of View: Image Height
• Lens Construction: 2 elements, 2 groups
• Lens Material: Plastic, aspheric
• IR Filter: 50% Transmission 650nm
• Image Quality: MTF (Modulation Transfer Function)

Special rays are defined with respect to the aperture stop or pupil of the optical system. A chief ray passes through the center (or centroid) of the entrance and exit pupils of an optical system.

Typical Analysis of Chief Ray Angle

• Two element design
• Maximum chief ray angle 18 degrees
• Diagonal FOV 52 degrees
• Overall length < 8 mm
• F / 2.5
• Distortion -3% @ 2.25 mm image height
• Relative illumination = 65% @ 2.25 mm image height
• No diffractive

Process Highlights

• Assembly using Class 100 cleanroom
• Less than 5µ particulate control
• Die placement accuracy of +/- 25µ (1 mil)
• Mount attach placement accuracy of +/- 50 µ (2 mils)
• Automated assembly process
• Automated lens barrel insertion
• Automated focus solution
• Substrate strip assembly

• Substrate: BT laminate; HTCC ceramic
• IR Glass: Standard boro silicate glass, with / without IR coat
• Mount: Design specific
• Lens: Design specific
• Barrel: Design specific
• Die attach adhesive: Non-conductive
• Wire: 25 µm diameter, Au

• Camera module design - Utilizing our team of design engineers, the camera module has been designed to achieve the lowest cost assembly and the most optimal module size.
• Optics design - Amkor has partnered with the leading optics supplier in the world in order to provide the best and lowest cost optic solution.
• Supply chain management - Amkor has the capability to procure and manage all the components.

• Wafer backgrind of wafer with micro lens
• Stack die capability
• Flex circuit attach
• SMT of passive component
• Automated lens insertion
• Automated lens focus