Kingmax Digital, the Taiwanese manufacturer of memory storage products, announced it is going to release a 4GB SD 2.0 compliant microSDHC memory card. To create the 4GB memory card, Kingmax has integrated advanced flash storage technology from top manufacturers in the field: Kingpak Technology, Samsung, Silicon Motion, and Nanya Technology.

Kingmax's microSD 4GB is produced with Kingpak's die stacking technology, which exercises precise control in grinding the thickness of each die. Kingmax also uses Kingpak's proprietary PIP packaging technology that uses substrate from Nanya Technology, and wire bonding using 20 um gold wires. Nanya's super-thin substrate, which measures only 0.11mm, makes a good choice over a normal substrate which has a thickness of 0.2mm and is difficult to use in small form factor memory card production. The thickness of each die is of only 25 um, and is composed of stacks of 8 layers.

The Kingmax microSDHC utilizes Samsung's 63 nanometer process technology which allows a similar 4Gb flash memory to have an even smaller form factor so as to accommodate future designs in creating higher capacity memory cards. This technology allows Kingmax to supply twice as much capacity in its memory card products than its competitors.

The microSDHC also uses Silicon Motion's SMI 268 controller, a flash memory controller made from a 0.18um process technology. The controller supports dual channel read speeds of up to 150X (22.5 MB/sec) and read speeds of up to 127X (19.1 MB/sec), and complies with flash products of different speed classes for minimum write speed (Classes 2, 4, 6). The SMI 268 allows for complete compatibility with all SDHC specification mobile phones and digital cameras.

Kingmax's 4GB microSDHC memory cards support HD and DVD video, as well as Super VCD, DVR and digital TV's MPEG-4 HD image formats.