The group immediately set a clear goal to produce an array of silicon diffusion mesa transistors for digital devices, utilizing the research results of Bell Labs and Shockley Labs. Moore, Hoerni and Last led three teams working on three alternative technologies. The technology of Moore resulted in a higher yield of operational n-p-n transistors, and in July–September 1958, they went into mass production. The release of p-n-p transistors of Hoerni was delayed until early 1959. This created the Moore-Hoerni conflict at Fairchild: Moore ignored the contribution of Hoerni, and Hoerni believed that his work was unfairly treated. However, the Moore transistors formed the prestige of Fairchild Semiconductor – for several years, they beat all the competitors.