The entry-level model in the new iPad range costs $316 - around £200 - to manufacture, with the high-end model estimated to have a bill of materials closer to £250.

These figures come courtesy of IHS iSuppli, based on a physical teardown of the components in the new iPad. One of the mid-range models - the 32GB model with Wi-Fi and 4G networking - costs $364.35 (about £230) to manufacture, compared to the $335 (£211) that the 32GB Wi-Fi + 3G iPad 2 cost to produce.

The Retina display, costing $87 (£55) is a major factor in these increased costs, IHS said. "The Retina display represents the centerpiece of the new iPad and is the most obvious enhancement in features compared to previous-generation models," said Andrew Rassweiler, senior principal analyst, teardown services, at IHS.

"The first two generations of the iPad employed the same type of display—a screen with resolution of 1,024 by 768 pixels. For the third-generation new iPad, Apple has taken a significant step up in display capabilities and expense, at four times the resolution and 53 percent more cost."

Samsung produced the display and processor in the model IHS looked at, while Toshiba supplied the NAND flash memory. IHS also believes that Samsung supplies the battery cells, though stated that it was not completely certain of this. The lithium polymer battery in the new iPad is good for 42.5WH (watt hours), up about 75 percent from 25WH in the iPad 2.

"We believe Apple likely has qualified three sources for the display in the new iPad: Samsung, LG Display and Sharp Corp. However, it is likely that all the volume shipments of the new iPad display are currently coming from Samsung. In line with this view, the individual new iPad torn down by IHS includes a Samsung-sourced Retina display," IHS said.