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.[32] Moore, Hoerni and Last led three teams working on three alternative technologies.[82][83] 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.[84] The release of p-n-p transistors of Hoerni was delayed until early 1959.[85] This created the Moore-Hoerni conflict at Fairchild: Moore ignored the contribution of Hoerni, and Hoerni believed that his work was unfairly treated.[84] However, the Moore transistors formed the prestige of Fairchild Semiconductor – for several years, they beat all the competitors.[84]