21 1 A HARDENED TECHNOLOGY ON SO1 FOR ANALOG DEVICES E. Dupont-Nivet, E. Delagnes, J.L. Leray, J.L. Martin, J. Montaron. CEA. Centre d'Etudes de Bruy&res-Le-CMtel, BP12.91680 Bruyeres-Le-Chiitel, France. J.P. Blanc, E. Delevoye, J. Cauthier, J. de Pontcharra, R. Truche. CEADTWETI, B.P. 85X - 38041 Grenoble Cedex France. E. Beuville, M. Dentan, N. Fourches. CEA, Centre d'Etudes de Saclay, F-91191 Gif-Sur-Yvette. Abstract - This paper is dedicated to the presentation of a hardened and mixed analog-digital technology under development. This technology now includes a PJFET with a quite good hardness, CMOS transistors with a potential multi-megarad hardness and first tests of bipolar transistors with a not yet optimized s!ructure (structure of the JFET) All the results achieved so far, together with the optimizations under way will lead to an analog technology with a digital capability and a high level of hardness neutron fluence, cumulated dose, immunity to upsets) to address the needs of military applications and electronics br the elementary particles physics detectors of the next peration colliders. I. INTRODUCTION Most of the systems include numerical and linear -rcuits. The development of hardened digital circuits is now rrcU established with the disponibility of basically hardened zchnologies. However the problem of the linear parts is rather dved one by one. But there is a need for hardened linear 39~s and there is also a strong tendency to mix linear and opal functions together and to ask for more complexity and xrformances. To address these needs, a hardened linear rehnology with a digital capability is under development. The cost of development of a technology is important sough to try to find several applications for a single process. 3 technoiogy described here aimed at meeting the needs of drary applications and particles physics. iL .NEEDS AND SPECIFICATIONS FOR A HARDENED LINEAR TECHNOLOGY ?articles physics One of the main goals of elementary particles physics 5 be test of the "Standard Model". A part of this goal is to -ai out particles with a mass of about 1 TeV, which implies the building of accelerators able to reach this energy range. So, the scientific community projects the building of a proton- proton collider. the LHC (Large Hadron Collider), which should be installed at CEFW before the end of the decenny. A high spatial resolution will be required for the detection of the secondary particles tracks issued from the collisions. A detector at LHC requires several million acquisition channels. These acquisition channels must be very integrated. Furthermore, taking into account the very high number of channels to be used, it is not possible to get out as many connections as the number of channels. An in-situ pre- treatment is necessary, which implies the realisation of an important part of the electronic in the detector. This electronics should have a very low power supply, due to the high thermal dissipation of the large number of channels. I 1 CI n T U I Clock p 1st level sampling+ Digital conuol 70 MHz Figure 1: Schematic diagram of an acquisition channel for particles physics electronics. To increase the probability of Occurence of rare events at the energy that can be reach by the collider, it is necessary to have an important fluence of incoming particles (luminosity between and 1034 cm-2.s-1) and a high repitition rate of the collisions (event frequency of about 66 Mhz). These conditions imply a high level of radiations in the detector. The in-situ elecuonic must be hardened , according to its 91 -57939/92$03.000 IEEE1992