It’s been rumored for some time that HTC had designs on launching a Windows RT tablet. Now it looks like the company may be very close to doing just that.According to NPD DisplaySearch, mass production may already be under way. Some industry sources in Taiwan believe that electronics ODM Pegatron started building HTC’s tablet in the first quarter of this year.Nothing official has been revealed yet, but the HTC Windows RT tablet is expected to feature a 10.1-inch, full 1080p HD display. It’s also believed that HTC has chosen to build the tablet around a Qualcomm Snapdragon chipset, which wouldn’t come as a surprise. HTC leaned on Qualcomm chips in both the Flyer and Jetstream tablets, and also on its recently-launched HTC One flagship phone.At one point HTC was said to be considering an Intel processor for the slate. Ultimately it was decided that an Intel-based tablet would carry a retail price that was just too high to attract consumers.Rumors about HTC’s Windows tablet ambitions started swirling as far back as 2011. As the retail launches of Windows 8 and Windows RT approached, however, news trickled out that HTC wasn’t selected as a first-round manufacturer by Microsoft.But as Windows RT devices continue to struggle to gain market share, Microsoft is ready to redouble its efforts. That means letting additional manufacturers — like HTC — get in on the action. It also means making concessions and tweaking certification policies to allow for an even greater variety of devices.